The strangest place I've jacked off is on a train ride through Africa. It in a small room where there were two other men and myself. They fell asleep (as it was an overnight train ride), but the jostling of the tracks kept me "up" all night. One of the men fell asleep on my shoulder, and his head eventually slid down onto my lap. It wasn't quite jacking off, but his head swayed on my lap (along with my cock) in time with the motion of the train. It wasn't long before I gave a groan and slid out from under him to go clean myself up. The bloke was still asleep!