MX vs. ATV Alive

The way I got this was mostly by doing whips. To do a whip, aim both the Left and Right stick either left or right when taking off of a ramp. This can be done in races, Free Ride, Single Player, Xbox Live, and Local Multiplayer.

I really don't understand why nobody mentions the easiest way to complete this is by doing stoppies.

This is how I mopped up the remaining stunts I had left:

1. Create a private xbox live match on the Kinoko short track or launch a single player session on any of the free ride maps. (I mention the private match since you can ride by yourself in the lobby as long as you're alone and you have unlimited time to do so)
2. Select an MX (two wheels) I don't know if the ATV (four wheels) works for this but it's easier to maneuver with a bike anyways.
3. Start doing stoppies! just accelerate a bit with then press to brake while pushing the right stick forwards. If done correctly your bike will stand on its front wheel for a second and you will get the text STOPPIE in all caps on the upper side of your screen.
4. Rinse and repeat!

By far the quickest and easiest of the stunts since you don't have to pull the overly complicated WHIP or struggle to maintain your balance with a WHEELIE. You don't even have to press the trick modifier button ()! With stoppies you will get these achievement in mere minutes!

The easiest way to do this is by doing wheelies. If you haven't completed the 35 wins/50 online races, this is the perfect place to do it. Just do a wheelie, stop, do a wheelie...and repeat 100 teams. A jumping stunt isn't required, as I got this doing a wheelie, with no air stunt completed.