Dog cells play Quake.

Interesting:

A University of Texas scientist has grown a living "brain" that can control the video game Quake 3: Arena made by id Software, allowing scientists to study how brain cells compute and deal with sensory input.

The "brain," a group of 50,000 nerve cells taken from a dog and raised in a Petri dish, lets scientists observe brain functions at the cellular level in real time. Scientists hope to better understand how the brain deals with sensory input which may lead to treatments for certain types of blindness and brain trauma...

Update: Or maybe not. You can't believe everything you read on the internets.