Tamatoa is just entering his lair when the bubble explodes, sort of hurting his claw? Mostly it feels like having someone slap someone out of your hand, which is both annoying and also sort of rude? He lets the van go, shaking his claw as if burned.

"Ow!" he says, obviously offended. And then the yo-yo smacks him in the face. He puts a claw to his cheek, stunned. "OW! Where did you come from?"

He focuses on snapping his claws at Smoky, since obviously they are the one causing all the problems right now. The van is free to sink at its own pace - he can get that later.

"Get... back... here!"