He was telling stories from on the set, talking about other actors, how they behaved, and his experiences with them. Michael (Dumbledore) is a chain smoker, reads the script right before the camera rolls, and if you don't get the take before lunch, you don't get the take.

Alan Rickman (Snape) is brilliant, but on the set of HBP, he wears this billowy cloak connected with a chain below his neck. If anyone stepped on it, Alan would be choked! So in a scene where Draco is walking fast behind Snape through the Great Hall, the director told Tom to stay really close behind him. Alan turned to Tom very Snapeish and said, "Don't [expletive] step on my cloak!" So Tom was worried about that all the while the director [was] telling him to walk closer. Well he did step on it in the end, choking Alan. But then other people did it later too, so he didn't feel too upset about it.

They loved the dolphin, Coral. I spent a half an hour in the water with them and the dolphin. They loved her! There was another British family who recognized him. They were polite but you could see the Squee behind their eyes. When Tom leaned in to kiss the dolphin and hesitated for a second, the mother said, "Of come on, you can't be frightened of the dolphin, you can do magic!" Which almost made me die of embarrassment! I don't think he heard her though because he was concentrating on the dolphin.