Cruiser/Radical Boards:

FrontsideGrab = Left
BacksideGrab = Right
NoseGrab = Forward
TailGrab = Backward
Rocket = Forward+Backward
RocketRoll = Left+Right
AirTurnLeft = Left+Forward
AirTurnRight = Right+Forward
On the Cruiser and Radical boards, the following tricks require you to also hold the Left mouse button:

RocketRoll = Left+Right+Leftmouse
AirTurnLeft = Left+Forward+Leftmouse
AirTurnRight = Right+Forward+Leftmouse

Freestyle Boards:

FrontsideGrab = Left
BacksideGrab = Right
NoseGrab = Forward
KickFlip = Left+Forward
KickFlip02 = Forward+Right
StaleFish = Left+Backward
BacksideBig = Right+Backward
Superman = Forward+Backward
TailSlide = Right+Backward+Left

MOUSE:
(From a stand still on ground)
Tapping BOTH mouse buttons at the same time and holding for 1 second then releasing both will climb the HBT straight up indefinitely.

I was able to climb to about 7km before I got bored. This was also done with a group earlier with another driving. Est Vehicle ceiling is 700km, or way up in space 🙂

Taping the left click once more at any point will stop your ascent. The HBT will then hover in place, without descending.

(from stationary on the ground)
Tapping right mouse button then left mouse buttons at different times in succession
*tap*(holdR)*tap*(holdL) *release both*
then releasing ill make your boat climb in one place to an altitude of about 30-40 meters then hover in place.

(From a stationary on ground)
Pressing and holding the left mouse button will ascend you perhaps 10 meters, and move you forward continually.

The right mouse button will cause you descend at any time.

Clicking the two mouse buttons again will cause you to ascend again at any point once you’re off the ground, but you have to keep them pressed down to continue your progress up. (I think, my mouse is getting hot!)

“steering” the mouse by sliding up and down, left and right, will alter the direction and yaw and pitch of the craft.

KEYBOARD:
Holding the Up and down arrow keys at the same time will cause the HBT to ascend as long as you hold them down. When you release them, the boat will hover in place.

Forward is accelerate,
Down causes you do descend
left and right steer