Watch the truly terrifying moment thousands of spiders are filmed falling from the ceiling and crawling all over an abandoned building in Mexico.

A video has emerged showing what, for many of us, would be our worst nightmare.

Thousands of spiders have been filmed at an abandoned building in Mexico which has been completely overrun by the arachnids.

Thousands of spiders grouped together on the ceiling (Mikel Maas)

Thousands of spiders grouped together on the ceiling (Mikel Maas)

WARNING DO NOT WATCH IF YOU SUFFER FROM ARACHNOPHOBIA