TrolleyDave said:They Live (best fight scene ... ever)
Mallrats
Dodgeball
Office Space
The Simpsons Movie
The Prophecy
Toxic Avenger
Blazing Saddles
Caddyshack (Rodney Dangerfield rules!)
Jay and Silent Bob Strike Back
If you don't mind subtitled movies there's
The Twins Effect (Chinese version of Blade)
The Twins Mission
Sha Po Lang
Dragon Tiger Gate (manga truly brought to life)
Breaking News
Banlieu 13 (not sure if I've spelt it right)
Infernal Affairs
Joint Security Area
Shaolin Soccer
Kung Fu Hustle (awesomely funny)
King Of Comedy