Luther sat his hands tucked in his pockets through Professor's question, his classmates' answers and Professor's instructions. Without taking his hands out of his pockets, Luther practiced the incantation.

"Gow-de-oh." Nope. "Gow-dee-oh" Close but not exactly. After a couple more tries, "Gow-dee-oh. Gaudeo!"

Then, with a sigh, he completely focused on his hands and dimming the glow as much as he could. After taking calm breaths for a couple of seconds, he gently took out his hands out of his pockets. They were not glowing like a little lighthouses. Luther would even say it was not distracting at all. Before long, he started practicing the wand movement.