On the way home from a late shift in an unlit rural part of the commute, I came across a cyclist who'd come off his bike and the chain had jammed 'twixt the inner chainwheel and the bottom bracket. He was having major issues trying to free it so I gave a hand. Interesting that he was thoroughly impressed with the amount of tools etc. that I carry as a matter of course ( shades of the 'What do you carry' thread here - ! ). Managed to pry enough free with a spanner to be able to pull it clear with my hands, but ruined a pair of gloves in the process - ! Before you ask, poly gloves would have torn in the process, the chain was that badly wedged. He was even more surprised when I produced a pack of travel wipes for him to get the worst of the grease off his hands - !