From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
The Pesky Fly (うるさい ハエめ) is a rush attack used by Doctor Gero. First, Doctor Gero laughs and claws the opponent up into the air. Then, he jumps up to grab the opponent by their leg and throw them away. Finally, Doctor Gero teleports behind the opponent to knee the opponent twice down to the ground, inflicting a great deal of damage.
Doctor Gero used this attack to ambush Kuririn. While the Z Warriors were in pursuit to find Doctor Gero's Laboratory, Doctor Gero sensed Kuririn nearby and decided to ambush him. He fired an energy wave at Kuririn's direction, but ended up blasting some mountains, which created an explosion and harmed the nearby animals. When Kuririn flew over to the sight of the explosion, Doctor Gero ambushed and attacked Kuririn with the Pesky Fly rush, injuring and knocking him down to the ground.