"There weren't any overt signs of tampering," Q says, just the teensiest bit defensive. Of course, he'd run out of the house before running any thorough tests. "Sounds a bit like a joy buzzer to me," he comments absently. "I tried Finite Incantatem, he tells Severus. "Absolutely no effect. If anything, the vibrations increased after." He sighs. "I don't forget Severus, honestly I don't. It's just, well, I panicked." He flushes and looks at the floor. "Sorry, but it was very unexpected." He looks up. "Actually, that wasn't the only thing odd that's happened today."