Not really crazy but a Snickers McFlurry with pieces of peanuts and chocolate covered peanut nougat swirled with Caramel and Chocolate Sauce...
But I could live without McFlurries if Hot Fudge Sundaes were back on the menu ... it's so unfair you can buy them in Wales and Scotland but not England!!
Also, if they still existed in the UK (curse you, Australia and territories where they're still produced) - ASTROS MCFLURRY!
On a separate sidenote, I made myself a home-made Pretzel Flipz McFlurry with my ice cream maker and some Marks and Spencer Belgian Chocolate coated Pretzels...
I don't know if anyone has been to manly in sydney (australia) but they have an icecream shop where you can have almost any chocolate or sweets of your choice mixed with a huge variety of different flavour icecreams.
Was amazing and quite similar to what people have been doing on this thread (my reason for bringing it up)