Bill Schmitz shares some tunnel shenanigans from his last couple of days at Skydive Arizona in Eloy before heading over to Europe. Guaranteed to put a smile on your face.

Although you can't swoop in the tunnel, you CAN fly your wingsuit in the tunnel (if one were so inclined). Inflight Dubai's resident wingsuiter and instructor Dani Roman takes his wingsuit for a spin indoors.

Unless you've been living under a rock for the past year, the Undercover Ninjas need no introduction. They're back at it again with more badass tunnel flying, and if you've made it this far that means you're still reading instead of watching this awesome video. Stop reading. Watch video. You're welcome.

Getting up at 4am is never fun... unless you're heading to the tunnel for a solo session. Vania Videography presents "Out of the Blue" -- a late night dynamic freefly session with Rafael Schwaiger.

Wow, this takes some "sirius" skills to pull off! Joel O'Donoghue, chief tunnel instructor at Sirius Sport Resort in Finland, performs the first-ever wind tunnel routine in a straitjacket. That's just madness!

So, you've already met the Undercover Ninjas in Part 1 from iFly Seattle. Now here's what we like to call the meat and potatoes... less talky talk, more fly fly.

Get up close and personal with the Undercover Ninjas -- a group of hardcore freefly kings and a moving force in the skydiving community. Now that you've met the crew and know what they're all about, this is just a taste of their latest tunnel sessions at iFly Seattle, so stay tuned for more ninja action.

Most of us cant finish the Rubik's Cube after 10 hours straight, yet James Wilson smashed the puzzle in 3 minutes and 16 seconds while floating around in the Airkix wind tunnel - landing himself in the Guinness Wold Records as the first person ever to do so. Now check out this other dude solve the Rubik's Cube in freefall while riding an inflatable raft. Yup.

Finland's new Sirius wind tunnel is the sexiest tunnel design I've seen to date. Check it!