Our party was once in the top level of a stone tower in the underdark, guards rushing up the stairs at us, very little time to react. As it turns out, our rogue had a sword forged from some Adamantium, that could somehow cut through stone. Rather than fighting through guards, we decided to just continuously cut holes in the floor to escape. We crushed a lot of stuff. It was a good time.

Another time (still in the underdark) we were in a cave system coming up on some Hookhorrors. I sent my gnome in after realizing that they relied on extremely sensitive hearing and used Thunderwave right next to it, which more or less was the equivalent of a couple hundred decibels right in your ears.