Bet on Black, occasionally referred to as "Snail Race", is an advertising campaign run in 2000 by Diageo to promote Guinness-brand stout in the United Kingdom.

The piece, directed by Frank Budgen, follows a snail race taking place in a town of Latin American appearance.

It is the third piece of the Good things come to those who wait campaign launched by Abbott Mead Vickers BBDO in 1996, following on from Swimblack (1998) and Surfer (1999).

After 14 seconds however, the snails begin the race, comically moving very fast (akin to the speed of a slot car) with the music and cheer returning.

A shorter, forty second edit of the advert, beginning with the shot being fired to start the race, began to air after a while.

Although Bet on Black had been on television for some time by this point, the release of the single saw the advert run again with the new Gypsymen version in place of the original.