Rlvlk

Corrected entry: The basilisk is supposed to be moving through the plumbing, but when it petrifies people it's in a room or hallway. How does it get out of the plumbing and into the room? It's too big to fit through a tap, drain or toilet. If it has to knock a hole in the pipes and walls to get out, surely someone would have noticed gaping holes everywhere?

Corrected entry: Look at the blood writing on the wall. Tom Riddle says that it was written by Ginny, but you can see that it's too high for her to write - we see a flashback of Ginny writing the blood on the wall, not standing on a chair and clearly not standing on a ladder.