There's no way he's about to suggest some of the awful things Tony has come up with to call him. El presidente is just the tip of the iceberg.

Bruce quirks him a smile and a wave back, not even bothering with a you're welcome, considering it unspoken. This is another responsibility to take on, holding onto this blood sample, but Bruce doesn't mind. Jim has good reasons for it and he's letting him stay in control of it.

He's also, he realizes after he's watched him walk out the door, left him with a tribble when he'd so assiduously been trying to keep them out of his lab.

"Damn," he sighs.