Plot hole?
Al comes back with cancer and looks a mess, but he was only gone for 2 minutes. This leads me to believe that you age while on the other side, because cancer progressed so quickly while Al was away...
So then you cant be in loop after loop if you only have so many years of your youth and life... Its not just 2 minutes that passes? Its years and you should come back looking ancient, if we base that on Al's progressive disease in 2 minutes.