MIAMI - A Miami Fire and Rescue Lieutenant spit on by a homeless man, then unleashes several punches on the man while he's on a stretcher and it was all caught on camera.That man, identified as 29-year-old Cruz, was located and later cuffed to a stretcher, before being transported here to Jackson Memorial Hospital.In the surveillance video, you can see Cruz flailing about while on the stretcher appearing to be shouting.That's when you see that firefighter lose it, throwing punches at Cruz, while several people try and break it up.Cruz was charged with aggravated battery of a law enforcement officer."