Thanks for all the answers!

I've been trying your tricks on the heavybag. I can't use them in the gym because the trainer keeps telling me to use the other hook technique (pivoting the foot where the punch comes from) and we never do inside fighting ...

I'm still not 100% sure how to use my hooks to maximum potential. I try to study all fighters with great hooks, but it's hard. Any tips on that would be really appreciated.