Lezard Valeth had never handled disappointment well. What he could not prevent, and refused to mourn, he would still sulk over.
He caused the weather to suit his mood -- no whimsical rain of frogs, but a dull drizzle muffled by unpleasantly warm fog. He found that books did not divert him. A few rounds of "Where's an Egg" in the compy lab were rather more stultifying than distracting. The happy idea struck him that he still had a friend left to visit.
He materialized outside Snape's door without more forewarning than a simple knock. (He did, at least, wait for the door to be opened, and for his friend to invite him in.)