question about the final bowling scene

Rating: 8/10 (21 July 2006)

In the final bowling scene when Munson is playing against McCracken in the tournament for the million dollar prize, the scene cuts out in the middle and you see Munson and Ishmael standing against a wall, naked, in a line with a bunch of naked guys. Then someone calls them a scumbag, and a guy begins spraying the line of guys with a firehose. This goes on for a few seconds and then jumps back to the bowling alley and the tournament resumes as if nothing happened. i don't get this scene. i don't know what significance this scene had in the movie and i don't know why they were being sprayed and i was wondering if anyone could possible explain this to me?