Oh man! Now I have to check to see how the front wheels of my Catrike are held on.

I can tell you from personal experience that the front wheel disc brakes have PLENTY of stopping power to lift the rear wheel off the ground. It won't endo, though, because the sprocket bash guard hits the ground to stop it. Might it eject a front wheel? I honestly don't know. I've never needed to take one of the front wheels off. If I have a puncture, I just roll the trike up on it's side.