cool your head

1. A line first said in Dragon Ball Z by Frieza after killing Kuririn.

2. "少し、頭冷やそうか" ... A line popularized in Mahou Shoujo Lyrical Nanoha StrikerS said by Takamachi Nanoha, right before blasting Teana Lanster out of the sky in the "White Devil" training incident. This is also the scene where Nanoha is officially nicknamed the "White Devil" by fans.