Luke and Halina sometimes do this thing where they take turns playing post-modern sounding art piano (improvised, silly, smart, and a little soulful) while the other one dances. Luke has great titles for his typically feisty pieces. Examples: 

Mouses Jumping on a Trampoline

Robot Ears

Touch the Camel

Halina does dramatic tempo and volume changes while repeating lyrics about something like wind chimes. 

It's hilarious. I swear sometimes they've been sneaking off to watch old SNL skits ("Choppin' Broccoli," etc.) and working on their ironic humor.