Oops. He'd let the proverbial cat out of the bag without even meaning to, and he expected that now he'd have to explain himself. Letting out a breath, he began to explain.
"Before I came here today, I was asked to visit Professor McGonagall. I figured she was going to ask me advice for dealing with a creature not that Hagrid is..." Trailing out, he let the words hang for a moment before continuing. "She asked me to take a teaching position at Hogwarts instead."