what is the mozart song that is featured in Jackass as well as in other action movies?

Answer 1

...if you are, perhaps talking about the intro to the first "Jackass" movie (the giant shopping cart), then we're not talking Mozart (...although he did write and compose sme similar pieces).

The composition, as you said that was used in not only "Jackass" but in other action-type films ("Excalibur", for instance), is "O Fortuna", written and composed by Carl Orff.

...a very powerful piece of music!!!