Gucci Mane fans beware ... there will be no questions asked, if you jump on stage during his concert ... you're gonna regret it.
Check out the video, where a fan stage-crashes during the rapper's concert Friday night at Brooklyn Mirage. Security is there in a heartbeat and hurls the guy into the crowd.
Gucci doesn't miss a beat as he continues his song, "Wasted."
Unclear if the dude was hurt, but EMS was not called.
You've been warned.