"Wh-" Andrew turns to look at the others, staring in shock and horror...only for the itchiness to suddenly intensify and then disappear completely as his entire body sprouts shaggy brown fur. Then he's rapidly shrinking - no, not shrinking, exactly - he's becoming much more compact while retaining more than half his mass. He falls to all fours, his clothes loose around him, and gives a startled bark. A bark? Is he a dog?!

Actually, Andrew has become a capybara. All he knows, though, is that he's suddenly very short, very round, and very much confused.