Invincible when you're seeing the stars?

It would be cool if the karts were invincible for the period where the stars are swirling around their heads - preferably only for 'Beginner' and 'Intermediate' ('Expert' should mean just that, IMHO). This would avoid the "player gets pwned by AI" situation, where the player gets hit, tries to accelerate and get another hit by another AI - repeat once or twice more, and you're pretty much "out of the game", at least if it's a short track/few rounds. And this certainly should go in 3 Strikes Battle - for obvious reasons (hit opposite, turn around, hit again etc, easy when having three cakes). 
