What gives you weird taste sensations?

I have just made up a bowl of mixed nuts, a few wasabi peas and a few pepermints tossed in for a refresher.

Unfortunately, I wasn't watching what I picked up and got a good selection of all of them in one chew... wow, didn't that send the taste buds into a spin.

On a more normal note I like monstera deliciosa. It tends to have a prickly sensation before the flavor hits which I quite enjoy, but many hate.