I'm not sure if I've told this story before, but a trombone in a session was responsible for just about the funniest thing I've ever seen. Jolly Jock from Biggles' Wartime Band joined us for a bit of a session up in Tideswell, and brought his trombone as well as his usual ukulele. He was singing a comic song, and punctuating each verse with a burst of trombone. Suddenly, a pair of matched Jack Russell terriers came tearing into the room. They identified Jock as the source of the sound, and proceeded to leap into the air (alternating perfectly, one up, one down) trying to grab the slide of the trombone, presumably so they could drag it off and kill it. As soon as he stopped playing, they sat perfectly still, with heads on one side, looking quizzically at Jock. When he started again, they were off again, leaping at the trombone. Jock had to keep lifting the slide higher and higher to avoid the snapping jaws, and it looked for all the world like a perfectly choreographed dance routine. How he finished the song I'll never know, because the rest of the pub was helpless with laughter for the next ten minutes!
Tim