George Bush Jr 9 11 speech full speech
at 5:45 Dubya says "you have been a force for good in the world" and right after saying that at 5:48 (5+4+8 = 17) there is a funny little chime
https://youtu.be/aaZ7Bt4fO6U
Whatever it was, the delivery of it during that brief pause between sentences was perfect.