"I cast a static electricity jinx," he whispered proudly, "until she figures it out, and casts the counter charm, she’s going to generate larger than usual amounts of static electricity. She’ll be getting random electric shocks, only little ones, and by tomorrow her hair should be pretty wild too. Her desk is gonna’ get really dusty really quickly as well," Ron looked confused, but Hermione leant back looking more than a little impressed. He picked up his fork again and continued his mission to finish his dinner.