Did something similar to my younger brothers years ago.
Hollowed out a sushi roll and filled it with wasabi then sat back and watched them eat it. Both still like hot food
wasabi goes nicely in honey and lemon for throat numbing / sinus clearing.
I love a good hot mapo dofu (spicy tofu) gives you the sweats like you've just done a good cardio workout - mix of the chilli and sichaun peppers
i went to a japanese place in sydney for my birthday and we did their "sushi roulette". basically, you get a tray of salmon nigiri but 1 of them is hollowed out and filled with wasabi. everyone is meant to grab one and eat it in 1 bite in its entirety. needless to say, i got the hot-shot - felt like i was going to choke as my brain escaped through my sinuses... really special experience, everyone should try it once.
sichuan peppers are the business til you can't feel your tongue.