Toronto teens thought their party was over when police arrived after getting a noise complaint,  police told them to keep it down, but then came a surprise no one expected.  The officers stuck around for a bit to listen to the band play, left the premises, then returned thirty minutes later to play with the band! The officer offered some advise to the young musicians before he left.

https://www.youtube.com/watch?v=lsvakyuGzI8