Q is certain he will never live this down, which is why he's focused on getting the damned thing running again. He can just hear M berating him right now, although he's at least blessed with silence from Bond.

That is... until he is suddenly thrown forward with the weight of the other man. "What the... Bond! I didn't agree to this," he snaps, his concentration distracted for a moment. He glances up, stumbling a bit under the weight of the other man. "I am not climbing up there. While you're busy wasting your time there, I could be actually getting us out of here." He may or may not be afraid of heights.