insert foot waaay into mouth

imagine you're asking a professor if he would like to be the committee chair for your master's thesis. the following blunder happens:
student: i would really like to work on you. i mean WITH you!
student is shuddering inwardly hoping the professor didn't notice.

ah hem, yes, that scenario happend to someone today. luckily the professor is young and seems a bit fruity. his reaction was actually kinda funny.