The Bazooka Joe tastes pretty close to how it sounds: that bubblegum you got as a kid for something like 3 cents a piece and it lasted forever, produced huge bubbles, and you had a contest to see who could chew the most and get the biggest bubble. Yeah, that one.
This shooter really reminds me of Bazooka Joe's initial, sweet flavor. The one problem you may have is finding the banana liqueur, but most liquor stores should have at least one option. 99 Bananas is the most popular brand.