Ok... so he isn't really trampy.
In fact, we are both so lousy at being trampy that it took us both 6 days for our achy backs to recover from about 6 minutes of trampoline jumping.
Let this serve as a public service announcement to all those of my generation.
When the college kids take you to a super fun rainy day place where you can jump around on all these cool trampolines...beware.
Your 45+ year old back will be happier if you limit your leaps.