Jitters

Jitters is one of two named radroaches caged in the sniper shack in Fallout 3.

Other interactions

 * If released, it will attack the Courier seeing as both radroaches are hostile from the get-go. After they are released the Courier can get them into their cage again by standing on the cage with the door open so they will follow the Courier inside their cage.
 * Despite being named creatures, they will respawn if they are killed.
 * If the Courier gets too close to the cage, the radroaches can attack through the cage bars and deal damage.

Appearances
Jitters appears only in Fallout 3.

Behind the scenes

 * Fluffy and Jitters have different names in some localized versions of the game, such as Cookie and Roby.