Are you outta your Vulcan mind
Embed

Bones: "Permission to speak freely sir."
Spock: "I welcome it."
Bones: "Do you? Okay then. Are you outta your Vulcan mind? Are you making a logical choice sending Kirk away, probably, but the right one, back home we got a saying, if you're gonna ride in the Kentucky derby you don't leave your prize stallion in the stable."
Spock: "A curious metphor doctor as a stallion must first be broken before it can reach its potential."
Bones: "My God man you could atleast act like it was a hard decision."

Bones challenges Spock after he decides to send Kirk off the ship.