cannons

1.

toplar

a large, powerful gun, usually attached to two or four wheels, that was used in the past to fire heavy stone or metal balls:

:
The 5,000-pound cannon predates the Civil War.
1.

toplar

to knock or hit against someone or something forcefully and suddenly, usually at an angle:

:
I was rushing along the corridor when I cannoned into someone coming out of a side door.