Actually really easy, probably going to get patched very soon also - Have fun.
Step 1 Get a quad.
Step 2 Drive into something solid like the concrete blocks in bases or the back of a C-RAM / Anti aircraft (Be sure to be holding shift or default sprint button down, the one that makes your vehicle go faster)
Step 3 Spam A / D (Left / Right) Until the smoke animation starts going crazyyyyyyy.
Step 4 Repeat step 3 for as long as you like, as there doesn't seem to be a cap on how fast you can actually make your quad go.
Step 5 Whilst still holding the sprint button steer away from the solid object you're driving into.
Enjoy it while it lasts gents.