I was at the show, a couple of seats over from Shawn Ray and Flex Wheeler. As soon as Paul started cramping and not long after his complete body locked up, Flex was yelling "Suck it in baby". Guess Paul was in too much Pain to "Suck it in".
The crowd was in shock when they carried Paul off stage. He was so cramped they just leaned him over and carried him off. No stretcher was needed, he was as stiff as a board.