gundam_aerial_slap_(meme)
Parody of a scene from Gundam Suisei no Majo involving the bloody hand of Gundam Aerial Rebuild after it crushed the terrorist's body into a bloody mess to save Miorine Rembran, though this also traumatized her in the process.
Also known as "Fresh tomato flavor" (フレッシュトマト味) in Japan due to a flavor of Aerial (food) snack food that was collaborated with the anime and a scene earlier in the series showing Suletta Mercury's hand covered in tomato juice during the festival, foreshadowing this scene.