Too short
Abit short, and could use some color to it, Black and white flashes are notbad, butl while its black and white, you Should add some color even if just a drop of red or blue here and there, like say a blood drop so that the Black and White reflects more it would be a nice, and would standout abit better, and improving on your Black and White animation. It was very short, so in that type of flash why not either add more content or you could make a flash with a number of short flashes like this one or even adding it as a part of some collab would be good aswell, anyways nice work.
Abit short.
~X~