Ok update it was NOT a leg cramp like previously stated. He actually pulled a calf muscle but not serious enough to cancel any remaining shows this summer. That's the latest from the Bon Jovi news camp. Going thru my pictures you can see that he was in actual PAIN but made the most of it to finish the show.
at least it happened at the end of the show. But still everyone around me to be honest when it happened got REALLY quiet so much so Jon had to coax us all to join in on Livin On A Prayer (or my version Limpin On A Prayer).