You'd better wet those bandannas you got stretched over your face!
5 seconds sound clip from the Fear and Loathing in Las Vegas movie soundboard.
You can hear this line at 00:24:59 in the Blu-ray version of the movie.
Quote context
[...]
- All right, our second group of ten is getting in place. Kawasakis, Triumphs, Maicos.
- Here we are, ready to go. It's the green flag, and they're off!
- Another great start with a lot of dirt happening on this hill!
- All right, here we go with the third group. And they're off!
- Number 45 riding in the number-four position is choking as the dust flies!
- You'd better wet those bandannas you got stretched over your face!
- There was something like 190 more bikes waiting to start.
- They were due to go off, ten at a time every two minutes.
[...]