I've had zero respect for Mika since he threw Corey's chalk under the table then pretended not to know where it was lolol.
He has other antics, but really demonstrates the maturity of a 9 year old on more than one occasion.
Mika keeps his own chalk with him when he plays. During one of his racks he has to move Corey's chalk out of the way a few shots in a row. Finally he picks it up and moves around a bit before tossing it under the table. (right at 30min in the video). Then Corey comes to the table and Mika pretentds to help him find it. All in all, pretty hilarious.