Coffee is not for Sirius.
"Professor McGonagall! Professor McGonagall!" McGonagall turned to see a very scared looking Remus Lupin running to catch up with her.
"Mr. Lupin, what's wrong?" Remus was usually the calm Marauder, and to see him in such a state of panic was surely not a good sign.
"Professor," he panted, trying to catch his breath, "It's Sirius. I told James not to do it, really I did! But he didn't listen...he didn't listen..."
McGonagall was concerned. Was Sirius hurt? Was someone else hurt? All that possible options that ran through her mind were not very good.
"What did James do, Remus?" McGonagall pressed. "What happened to Sirius?"
"James..." Remus hesitated. "James gave Sirius coffee!" McGonagall gasped; this was worse than she had thought. She'd seen Sirius under the influence of caffeine before and, well, that was when her hair started turning grey.
"Remus," she said, regaining her composure, "I need you to lead me to him."
"That won't be necessary," he replied, raising a shaky arm and pointing behind the Transfiguration professor. McGonagall slowly turned and her eyes widened in fear as she saw Sirius running at top speed down the hall towards her and Remus, a crazed look on his face.
Just feet before the hyper Marauder crashed into the horrified professor and werewolf, he jumped into the air and landed only an inch in front of McGonagall. Remus was now using his professor as a human shield.
"Hi, Minnie!" Sirius yelled, waving madly.
"Mr. Black," McGonagall said, trying to keep her voice from shaking too much, "You may stop waving now, I'm right in front of you."
"But I like to wave, Minnie! It's so much fun! Like eating pudding! Haha, pudding is a funny word! Let's name some other funny words! Spoon, cheese, Florida, mitochondria, floccinaucinihilipilification, squeegee, besmirch, kumquat, mustachioed, narf...Narf! Narf narf narf narf narf narf narf narf narf narf narf narf narf narf narf narf narf..." McGonagall and Remus looked at each other, then back at Sirius. As Sirius jabbered on, they each grabbed one of his arms and dragged Sirius off to the special room with the padded walls that they had prepared for him for just such an occasion.