I used to get that when I was working nights at my last job building drilling rigs...especially if it was one where I caught myself on fire. (Damn, now I've got another story for the "Dumbest thing you'll admit to" thread). Eh, I'll give the Cliff's Notes version here. I was standing on the crossmember of a gin pole welding overhead under the deck the gin pole was supporting, making some repairs after some "permanent deflection" occurred after a 500k pound pull test for this rig. Oops, I think that engineer forgot to carry the 2...anyway, I'm just standing there 25 feet off the ground minding my own, laying in some purdy beads, and noticing the orange flickers of light in the back side of my welding hood (being 2nd shift, it's nice and dark out by now). Then I realize my leg is getting a tad on the warm side. I stopped welding and raised my hood to find my leg from the knee down engulfed in flame...Couldn't exactly go dancing around since I'm perched upon this gin pole...As I start shouting and cussing and beating the fire out of my leg (quite literally), the jackass that was welding on the next pole over from me coolly says "I was wondering when you were going to notice that..." Asshole. 
It's funny now, though.
Walking into the local WaWa for a couple snacks for the ride home got some interesting looks. 
