BLUE MOUTHED APES MYSTERY

I've just seen a film clip on TV of a guy being chased down a corridor by a gang of apes with open luminous blue mouths.

Does anyone know what this might be?

PS. Thanks to a reader here we have the blue mouthed creatures in the flick Attack the Block, which I have never seen. They look great! I thought they were apes but they're aliens. Yikes! Have you seen it?