Warning to Tyrese's fans -- his reflexes are top-notch, so jumping onstage to hug him when he's not looking is a bad idea.
This video shows the singer closing his recent Valentine's Love Jam set in Detroit, and as he wiped off his face with a towel, an overzealous female fan lunged at him.
Tyrese didn't see her until she was right up in his grill, so he unloaded a stiff-arm shove -- totally in self-defense -- until security could remove her.
He seemed apologetic once he realized the situation -- but ya can't blame him for protecting himself.
Let this be a lesson to you, DO NOT rush celebs on stage. A similar incident took place with Keyshia Cole. WATCH HERE.