bermuda triangle

I found this recipe in an older cocktail guide a few years ago and haven't seen it in another guide since. I was at a bar, I couldn't decide on a drink, so the bartender pulled the book out from under the bar and told me to get back to him when I found something. This was what I hit upon and it has been a favorite ever since. Never mind that I can't order this without telling waitstaff exactly how to make it. :) Please note thatI have stated the measurements to the best of my recollection. Feel free to tweak this to your taste. FYI: Mango rum makes an interesting substitute.