Lol to the Skyrim one - I usually climb hills on a horse (they can go up a much steeper slope than you can on foot), so for example, I got up to high Hrothgar without ever using that massive staircase thing - I just went straight up the side of the mountain (took a while, plus I think I fell off once or twice) to their front door
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Let me see if I can remember a few examples of my own...
Okay, here's a moment that wasn't supid rather than funny. Plus no-one died. It was the first time I was playing Titan Quest (an ARPG, like Diablo and Torchlight, with an "ancient mythology" setting) with Ja'Ph' (I'd played and completed the game by myself before, though - this was his first time) and we were approaching the big boss of the main game (as opposed to the big boss of the expansion, which is at the end of the following Act). He's in a large area at the end of what's basically a long ramp that twists its way up a mountain and has some monsters on it thta need killing. We'd done that and were just running up the final stretch (so I knew that the only enemy remaining was that big boss guy). We were also playing using a mod thingy called Xmax which causes all monsters to spawn in their highest numbers possible (I like that it makes the game a bit more of a challenge, plus there's just something about seeing the floor utterly covered in monster corpses after you've cleared out one of their camps or anywhere else crowded). In the case of bosses, the maximum number is three, so I knew we were about to come up on three of this Big Bad, all of whom would be standing in the middle of that final area. So what did I do? Paused at the top of the ramp, just before the final, short staircase which leads into the main "arena" area in which you fight the boss (you can run out again - the entrance doesn't seal itself behind you or anything), and said "Hey, do you wanna go first here?" (we were communicating via voice chat on Skype, as we usually do), and was actually kind of surprised when Ja'Ph' thought nothing of it, but went charging into the area while I just stood there on the steps (I'm normally eager to just run in and start zapping stuff). The next thing I hear is "Aaaaaaahhhh!!!!" and he comes pelting back past me followed by at least two or three massive lightning-zappy-bolt things that the boss(es) can hurl at you. I swear I nearly pissed myself laughing, even though it was quite mean
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I can think of a bug-related incident which occurred when I was playing Thief: Deadly Shadows (the third Thief game) on my XBox some years ago. There's a point where you have these nasty people after you who wear hoods and wield these curved weapon things that shoot red bolts at you. The idea in the Thief games is that you're not supposed to engage in direct combat with anyone - you're a thief. You sneak around in the shadows, staying hidden, stealing stuff and taking people out by backstabbing, blackjacking, or shooting them (with arrows - you don't have guns) before they know you're there. So I was hiding at a spot near the docks of the city, and one of these bad guys was wandering around. There are plenty of resources at your disposal whichi you can use to disable or distract anyone who might interfere with your business if they see you (so, pretty much anyone except ordinary, unarmed citizens who can still run and fetch the guards if they see you steal something or find a body you've not hidden well enough or whatever). I tend to use very few of these, in fact I used hardly any the first time I played through the game - this means that I know I can play it through without worrying that I'll run out of most of it. So I'll mess around with it a bit. So anyway, I was at the docks. Deep water in this game insta-kills you so you should try not to fall in - naturally the docks, being by the sea, have a bunch of jetties sticking out over some deep water. I happened to have an oil flask on me - you throw one onto the ground and it breaks, making the floor slippery. You can also then shoot a fire arrow at it and set it on fire for a few seconds. I didn't bother with the latter but instead just threw the flask onto the jetty just as one of the hooded guys was approaching. He (well, might have been a she - you can't tell) stepped on the oil, and, unable to stop, started flailing his arms and legs around pointlessly and amusingly as he skidded straight off the edge of the dock...and then the game crashed. I tried it again after reloading (I save often so I didn't lose any progress as I'd've saved right before trying that trick), but it crashed again. Aaawwww
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I'm certain I'll think of more later on but those two probably take up about half a page so I'll leave it for now
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. Other times I'll be aiming at a villain and just as I shoot, he dashes off somewhere and I end up hitting an unarmed traveler that was behind the villain, killing the wrong guy 
