On July 15 2003 a bunch of students, 600 to be more precise, at Nanyang Technological University in Singapore had nothing to do so they started blowing up balloons.
But blowing up balloons was not enough, they also linked them together.
In all 5,239 balloons were blown up and linked together to form the world's longest balloon chain which covered 542.6 meters.
They did have ulterior motives though, they were out to beat the record of a 400 meter long balloon chain set by a bunch of bored Australians in 2001.
We could not find a picture of the world's longest balloon chain, so here's a picture of a short balloon chain