The ground and other things were red and flashing and my computer promptly crashed.

I created a new world with everything to maximum, which usually doesn't effect my computer, but this time it did. The game had multiple red spikes shooting into the sky and the ground had a red, flashing layer above it that I could walk through. I was in a forest biome. I then crashed. The seed is 4730096778893554501. Any attempt after this to access this world crashed Minecraft.