MIITB at 2010-10-17 18:17:39:
This movie did well because we knew exactly what we were getting, what the movie was about.
People who saw it went to get grossed out and laugh, and there was no question the movie would deliver that. Nothing more, nothing less.
There was no reason to wait for next weekend or two weekends from now to hear reviews or from friends if the marketing and promos lived up to the movie before shelling out $$.
I suspect this movie will drop off by the first week of Nov. for those same reasons. People who want to see Jackass 3D will do so this weekend or next.