A wave of flame retardant foam has engulfed the streets around a California airport hangar.
The foam blob spread after a fire alarm malfunction in a hangar at Mineta San José International Airport, leading the foam to leak through the vents.
According to the BBC, the public was warned not to touch the foam as it is a mild skin irritant.
However, of course, this didn't put everybody off. One man, Blake Harrington, decided to ride his bike through the foam cloud, appearing to bump into a sign as he emerged. He said afterwards: "Someone had to do it."
According to USA Today, it took at least eight hours to get the foam-fest cleaned up, and most of it was gone by around 8.40pm on Friday.