they punch him in the face
mind you..that seems to be their default reaction to any problem, and so far it looks like it's working too..
the whole time loop thing with superhoodie is slightly weird..but then, given how it has ended (so far)..I'm guessing that during the last transaction, Simon pinched Curtis' timetraveling power..which makes it all have a bit more sense..
also..just how far can his jumping back be removed? it's not like he was in his mid 30's or anything, in his future hoodie persona. allowing for the whole romance (which I kinda liked btw) to blossom, the holiday in vegas to take place, his parkour skills to get up to scratch, I'm guessing a year or two, not much more.