Due to some confusion over the Japanese katakana Gi (ジ) and Zu (ヅ), its Japanese name (prounounced “Jee-maâ€) was mistranslated as “Zoomer†in the NA instruction manual. They were more closely translated as "Geemer" in Super Metroid, but were recalled Zoomer in Zero Mission. Retro Studios played on this idea for the Prime series, and put both names in the game, turning them into two different species.
If Samus shoots out a destroyable block while a Zoomer is crawling along its edge, the Zoomer will go into an infinite spinning loop in mid-air. Then it's just a matter of either laughing at its predicament, or putting it out of its misery.