A body language expert said President Joe Biden appeared to be a “dead man walking” during Thursday night’s debate with former President Donald Trump. “I was really concerned because the minute [Biden] walked out on that stage, I felt he [was] not feeling good. His skin was pale, it was pasty, and he literally looked like a dead man walking,” body language expert Susan Constantine said, according to Fox News. Constantine said the physical dimension each candidate projected was a study in contrasts. “It was as if everything were in slow motion,” she said, speaking of Biden. “His fingers and his…