"riot police have enthusiastically embraced a surprisingly low-tech mobility solution: the bicycle"

TG:

Immediately, 10 fit, muscular police officers on black mountain bikes who had been watching from across the intersection in two columns of five, leaped into action.

Dismounting as they closed in, they pushed their bikes directly into the heart of the melee. Yelling instructions – “Move BACK!” – they used the bikes, and their bodies, to create a line, pushing back the crowd and separating the antagonists.

...

manoeuvres including “the crossbow”

...

“the bike squad forms a double column behind the line, far enough behind so they can get a little speed up,” Goetz wrote. “On command, the line makes a gap in the center and the bikes ride through this gap.”