Or.....in the olden days when bikes had kick starts, failing to notice said kickstart lever had gone up inside the leg of your ever so trendy flared jeans then pulling up at the lights and failing miserably to get your foot of the peg!
Or, sitting at the lights revving the nuts off the old Kwak Z1 to show the girlie's on the corner how cool you are and having the clutch cable break. The resultant wheelie across to lanes of moving traffic and on into the bushes on the far side was truly spectacular!!!
[Edited on 16-11-2004 by yeti]