Cassidy was a lot more powerful than people realized. He just never liked to use his powers unnecessarily, but when he had to he did. Calming people was like second nature to him now, after so many nights in the warehouse and with Tammy since coming to Limbo. Even once the words ended, Cas hummed the tune until it was clear that Scotty was calm, and that feeling would linger long enough. Thankfully while his gift did wear off, it was gradual and didn't abruptly revert someone into the state they were in before.
Only when he was mostly sure Scotty's panic should be subsided did Cassidy step back and let the young man go. Stepping out of the shower without a word he moved over to the sink and sort of rung out his shirt as the dampness clung it to his torso, showing off the only good thing to come out of Limbo- his abs. He ran his hands through his hair over the sink to get rid of the excess water with a small sigh.