So I went to the roulette table, put $400 on black, $400 on red at the same time, lost the black bet, won the red bet, cashed in my $800 winnings and went to bed.

I must be missing something here, how did you end up $800 ahead there? It seems to me you should have broke even...
_________________________
No longer a stranger, finally a full-fledged member! \:D