Sirius breaking into Gryffindor Tower!
Although, that bit with Harry, Ron and Malfoy, that was just so funny! I wish they wouldn't have left it out! "What was your head doing in Hogsmeade, Potter? Your head is not allowed in Hogsmeade. No part of your body is allowed in Hogsmeade!" That actually had me, my brother and my mom laughing so hard that we couldn't stop for about 10 minutes!