Reminds me of that moment when Aokiji wanted to attack Whitebeard and suddenly Jozu interfered, giving Aokiji a bloody lip and telling his pops to go ahead.
It's similar here. Debating about Zoro vs. Kaido, but then suddenly Kinemon interferes and pierces through Kaido's body, making Kaido scream in pain, with Kinemon telling Zoro to go ahead doing more important business.