Joe Biden almost took a spill on stage during remarks in New York on Sunday during a chaotic campaign event where a rally goer fainted, hecklers interjected and the president appeared to answer a question from the crowd about oil drilling in the U.S. When talking about lowering the annual cost of prescription drugs for seniors, the senior citizen himself got flustered when he tripped over something on the stage. 'Oops, stepping on a - hmm - it's black. Anyway,' Biden said.