We just have a fan at the front of the car, and you know sometimes it does more harm than good.......
A bit like the two fans in this video, which don't look like they'd have the capacity to dissipate a strong fart, let alone the exhaust from Ron Capps' car.
He's handed a mask at the beginning of the video; apparently he's the only wimp (or the only one with any sense) in the whole bunch. No one else appears to be affected at all.
YouTube - Ron Capps nitro funny car warmup @ Zmax 9-19-2010