Harry caught a quick glance of Snape’s faintly disturbed expression before he swept his way out of the Hospital Wing. McGonagall, however, waited until Harry had changed into the fresh pair of pyjamas that Madam Pomfrey had provided for him, and he was getting ready to try and fall asleep again. Vile as it was, the potion had worked its magic, and he was no longer trembling like a leaf.