(NIKKI KAHN/THE WASHINGTON POST)

In a stomach-churning video, the happy bicycling crew transforms into a screaming, wailing mass after a black car plows through the crowd with bodies and bikes richocheting off the hood.

The driver, 47-year old Ricardo José Neis, who works for the Brazilian central bank, has been arrested and placed under psychiatric care. He is being charged with attempted murder. Neis’s lawyer told the Brazilian newspaper Zero Hora that he felt threatened by the bikers and acted in self defense.

The bikers were miraculously not killed, though many other bikers have been less lucky.