"Watching wouldn't have been a problem if you'd stayed out of range, and I think it would have done nicely. Especially with an emotion-enhancing charm." He smiles, not especially pleasantly. "Less is more, when the statement to be made isn't a public one."
Severus takes a moment to apologize mentally to all the deer who are real deer and not Potter and don't deserve it.
"Mmmm." He takes a drink, still smiling a little to himself.
"I doubt he'd need pointing out," he says drily. "Seven or eight feet tall with crimson hair past his knees, a bright yellow trenchcoat, and eyebrows you could curry a llama with."
"Probably not, but--ah!" He snaps his fingers, remembering. "They used to make it with arsenic. There might have been some truth to the attitude."