Brand Name Players ...
Whenever Phil plays a tune in concert G, he likes to conclude by honking the lowest alto note, thereby ending on the tritone of the key.
Here are a couple of examples:
http://www.youtube.com/watch?v=uLNe6aaZMiM#t=05m34s
http://www.youtube.com/watch?v=9YKHk4YvwvY#t=06m08s
Cool, yes?