Flash Spirit (フラッシュスピリット) is a Rush Attack used by Bardock. First, Bardock elbows the opponent in the face, he then kicks the opponent away and then shoots a Full Power Energy Wave at them, inflicting great damage.
Bardock uses the Flash Spirit against Frieza's army in the TV special Dragon Ball Z: Bardock - The Father of Goku. After charging to Frieza's spaceship, Bardock conflicts Frieza's Army. After being shot by beams from a large group, Bardock emerges from the smoke and uses the Flash Spirit's elbow attack on one of Frieza's soldiers. He then encounters the next group. He dodges the first soldier, then uses the Flash Spirit's kick on the next, then the Flash Spirit's Full Power Energy Wave on the next, killing him.