"Well, I suppose run, don't touch that and that latest one, scream back could even be sound advice depending upon the circumstances," Hermione says thoughtfully.

"It's more than that," Ron finally says, having managed to swallow his pudding and wash it down with pumpkin juice. "My brother Bill says the only reason he's alive today is because of of one of the O'Connells' lessons, don't say anything in a tomb unless you're ready to deal with the consequences."