People at a Florida nightclub got a HUGE surprise Saturday night -- a 7-foot-1, over 300-pound one to be exact -- 'cause Shaq jumped into a mosh pit with them ... and danced his face off!!
It all went down at Celine in Orlando ... where DJ Diesel serenaded a Cuatro De Mayo crowd with a late-night set.
Shaq broke out his signature beats ... but then took the party one step further -- jumping into a sea of people going insane!!!
The clip's awesome ... clubgoers are hanging all over Shaq -- and he's loving it!!!
Don't worry, no one was injured!!
Of course, Shaq has been spinning the 1s and 2s professionally for several years now ... and has earned all kinds of praise from world famous DJs for his sets.
In fact, Diplo just told TMZ Sports a few months ago he's a huge fan of what Shaq's doing ... saying, "He's great, Shaq Diesel, man. He's killin' it right now. Very heavy music."