Or from my moto cross days
.. a mate fancied his tuning abilities and advanced his ignition (the moment the spark fires) The spark fires in the motor before the piston reaches top dead centre (I think is the term) anyways the bike was running ok as he joined the starting line, but he forgot to turn his fuel on (most common reason for bikes stopping because you turn the fuel off before you turn the motor off and forget to turn it on in the heat of getting to the line) he turned the fuel on restarted the bike. It was a clutch in start (unusual in those days as most were hand in the air or on helmet starts) anyways he did not know it but the motor fired in reverse on this occassion because of the over advanced ignition. Well only 34 bikes left the line he went over the handle bars with the bike shooting out backwards under him. Dropping the clutch on a 360cc bike at full revs is a handfull in the right direction but backwards it sure dug in
.It was the funniest thing
.
alex