i've done some mma myself years ago, i've been in few "underground" cage fights, seen some of those bouncing imbeciles. "fafafafa im gunno yall yoll jell ya ya knock yaaall you out yoo" and then he bounces around like a fucking retard and punching like a little slut.
best thing that works against those amateur bouncers, is actually a leg or kidney kick, they never expect it. autistic retards always try to punch you in the face, but that's not even most effective place.
well placed kick to leg, around the knee area can drop an amateur bouncer and well placed kidney kick will drop even a professional, seen it in UFC. it's no joke getting kicked in the kidney.
against those street bouncers, it's best to leg kick + punch, with bit of luck you'll get same result as seen on this video.