“HE VOMITED ON ME!” Snape yelled.
James snorted, trying not to fully laugh.
Sirius wiped his mouth with the back of his hand.
Remus stood there shaking his head.

“Professor I feel sick. I was running back to the common room when Sniv-Severus walked in front of me and got in the way. I didn’t mean it,” he said, feigning weakness.
“Right, Lupin, Potter, take Black to the Hospital wing for an antinausea potion. Snape, I should think you will go to your dormitory and get cleaned up.”

They did as she said. Trust a Professor to quell their plan.