Just as with my lab rats, these activities end in death.

"What do you mean she didn't want me to see her as a lab rat?"

I'll have your lab rats for you by tomorrow night.

The lab rat learned the action needed to be fed.

The lifetime of a lab rat is only three years.

Lab Rat opened the door and stuck his head in.

So what made all those lab rats lose their minds?

To her list of identities she can now add one more: lab rat.

You had to call them something, and lab rats just wasn't respectful enough.