I skydived once.  Tandem jump, free fall, from 16,500 feet.  Huge rush.

Skydiving with an umbrella (YouTube)

But when you do it over and over again like this guy, then start base jumping and even the base jumping gets old, what do you do next?

I suppose you do this.  Get airlifted by a hot air balloon then jump off it clinging to a patio umbrella.  This would've been far more interesting if the guy was insane enough to try it with only the umbrella, but yes he does finish the jump with a parachute.  Still worth a look though.  Here's the video.