FLASHBACK: Biden, who just fell on stage, once mocked Trump for carefully walking down ramp at commencement. Biden once said: ‘Watch how I run up ramps and he stumbles down ramps.’ Run up ramps? Hell, he can’t even walk across a level stage.

FLASHBACK: Biden, who just fell on stage, once mocked Trump for carefully walking down ramp at commencement. Biden once said: ‘Watch how I run up ramps and he stumbles down ramps.’ Run up ramps? Hell, he can’t even walk across a level stage.