Yes, I did say that. It would also be completely impossible by our laws of physics for that to happen.
Who knows what would happen? Every time they stepped into the hyperbolic time chamber, they did step into a different dimention and could still use their powers.
So, a power level of 600 is enough to destroy a planet, but 120,000,000,000 isn't enough to destroy a galaxy? Sorry but Star Wars has nothing in its arsenal to counter DBZ feats and power. So, Buu destroying dimensional barriers isn't proof?