what causes engine run on backwards?

[chip kigar <chip@hexnut.us>]

Sometimes when I switch off, I think my engine in running one backwards
a bit. evidence if I try to kill the run on in first, the car moves
backwards.. I think I've seen this topic before, but search some
archives without a hit.
What gives?
 
Charles Kigar
 Ckigar@hexnut.us