Fun! I did get a crash when I went to restart the race after losing. It was on the track at the left. Here's the trace that the console printed out (not sure how useful it'll be without symbols):
Error: unable to convert undefined to a number
--------------------------------------------------------------------
function _Au("unable to convert undefined to a number")
function yyGetReal([undefined])
function yyGetInt32([undefined])
function _69([undefined], 0, 1)
function _L4([instance], [instance])
function(769, 0, [instance], [instance])
function(769, 0, [instance], [instance])
function(769, 0)
function _l73()
function _S63()
function _x63(142861.496)