poison hair-spray

  http://www.giantbomb.com/giant-bomb-mailbag-barrel-of-fun-edition/17-2297/
 
from the most recent mailbag. 
 
didn't search, but laying this idea out I thought of it as soon as I saw it. 
 
last team to finish the endurance run has to use it on THEY HEADZ.

Yes.