You were in the Gryffindor common room when the door bursts open. James Potter and Sirius Black run in, panicked, as a Nervous Peter Pettigrew follows them. Shortly after Remus Lupin who gives a look saying 'I'm so done with their shit'.

Sirius: "We messed up!!!."

James: "Yeah. Professor McGonagall will not be happy that we pranked the entire Slytherin house..."