Were Loki privy to Tony's thoughts he might add that his ass, though otherwise somewhat remarkable, is so thoroughly useless that it requires two babysitters, one of them a deity -- but under the circumstances he's reduced to having to be a pain (in the ass or otherwise) via other methods.

"One does rather wonder why it is that Rogers insisted I go along with you, Agent... Sharon, whoever you are, if the only language you're willing to spout in my direction is going to be so..." He sucks in a breath, thoughtful, searching. "Monomorphemic."

A politely disapproving frown tugs at the corners of his mouth. "I believe courtesy dictates that if I am going to be assisting you, you do your level best to provide me with all the instruction and encouragement I'll require to do so. In return, I furnish favours. Simple, and if you were to have acted accordingly you might already know that I'm quite capable of getting us all where we're going much more quickly than this."

A sigh. "If only someone were willing to tell me where that is."