The Belgian reading association BOEK set a new world record for the longest book domino chain.
They did this to celebrate books and promote reading.
They spent a whole night setting up 4,845 books in a 600-metre domino chain and then knocked them all down.
The trail was 614 meters (670 yards) long.
It took two hours to set up — six minutes to knock down.
They celebrated their achievement with fireworks.
Click here to watch the rip-roaring video [warning to dull men: watching the firewords at the end of the video might be too exciting for you].
The previous record holders were from South Africa. Their chain consisted of 2,850 books.