Well I remember before I properly understood my fire jets, I tried a few times to use my fire manipulation abilities in combat. I remember rather humorously raising my hand up to throw a bloom of fire at an enemy and instead went rocketing backwards into a tree.

Even to this day my skill at landing when flying is... well not that good. Usually I just end up 'cutting the power' and letting myself fall into the general vicinity of where I want to be. Dream-me is more or less invincible so I sometimes just fall and crash through cars or buildings. (One time, I broke several tree branches when falling, another time I fell through a boardwalk, and yet another time fell through the roof of a building.)

Lest we not forget this:

Stars become visible, I am in deep space, and tumbling around uncontrollably. I manage to stop myself spinning and see the crescent of a planet or moon nearby. I look at the destination and attempt to rocket closer. Nothing happens. I decide to make use of voice commands.

"Fly!"

Nothing.

"Accelerate!"

Nothing.

"I am a rocket ship!"

Nothing.

"GOD F**KING DAMMIT MOVE!"

I half expect this to happen because it's happened before but I get jerked forward at an absurd speed and smack into the moon with such speed and force the entire moon disintegrates into molten slag and mountain-sized boulders.
It's only the third time I've collided with a planet at relativistic speeds and destroyed it.

And pretty much every time I've tried to teleport and either woken up or lost lucidity probably counts.