Snape hurried along the passageway. He remembered what Sirius said and considered transforming, but it was difficult to fly in an enclosed space.
At the entrance at last, he cautiously pulled himself up.
Lights flared, blinding Snape for a moment. He raised his wand and blinked, trying to be ready.
Someone pounded Snape on the back. "Thought we'd forgotten, Grip?" James said.
"Come and eat," Remus said. "We've got the best on offer."
"Happy birthday!" Peter held out a lumpy parcel.
Sirius put his hand on Snape's back. "I'll give you my present later, Sev," he said and smiled.