what happens if

When you tap the rear brake in the air it usually causes the bike to rotate forward. That is fine as long as just before you land you get back on the gas to reverse that rotation and get ready to drive forward. If you stall the bike in the air, you can't correct it if it over-rotates forward. I have seen good riders jocky the bike back and forth several times by alternately hitting the gas and the rear brake while airborne.

If you do kill the engine while in the air it is not too bad a long as you don't over-rotate forward before landing. Some bikes, 2 strokes and 4 strokes with automatic compression releases, will restart easily upon landing. Some will not, these include YZF426s, older KTM 4 strokes, and older XRs.

if the landing is slippery or your on a bike with lots of compression hold on because your going or for a ride............oouch...............if i did stall in the air without pulling in the clutch i would pull it in anyway before landing just so i would not land with the rear tire locked up and maybe crash (i do ride a 500 and they are hard to jump start) and then once under control after landing i would try to bump start

I do not believe Gomer emphasized the importance of keeping your bike running while pulling cool looking midair manevers!http://www.dirtrider.net/gallery/showimage.php?i=3225&catid=favorites, There are safer methods of getting your frontend down. Your first race,do not attempt this,learn and try it at home,or near a hospital!

Start off right and you in most cases wont have to worry about doing this. Do search on jumping tips.

I find it easier to just shove the front down, I have never needed to brake tap. You might get away with pulling the front back up. Still, grab the lever, hit the ground, and then you can try to bump start it. It could be a lot more fun than you planned for.