-Concrete is hugely comfortable
-You manage to blow chunks on the other side of a folding cupboard door
-You are suddenly pro at parkour.  like, FRENCH pro.
-breaking into the cars outside the BMW dealership is an excellent idea.
-All disputes can be solved with a vertical leap competition.
-You carry your buddy to the hospital after the vertical leap competition
-You start playing sports like Big European Stranger Rodeo (record, 8.59 seconds)
-You start kicking people just to see if you'll feel guilty about it.
-Everything flat is fair game for a power nap, including cars stopped at intersections.
-Drinking games become drinking sports, with officials, swiss timing, and biased commentary.