And that means that if people are constantly knocking you, saying you are the weak link in a powerful machine, the cumulative effect is grating.

Big Bird can give safety hints to all arrivals from Arkansas on navigating the Beltway without being constantly knocked down.

"I like the fact that the label is building something from the ground up - as opposed to artists who are constantly knocking on doors to get attention."

He was constantly knocking stuff over or slipping and sliding.

But that is always your way - you are constantly knocking things over.

Instead of constantly knocking celebrity casting, I think we should also embrace it.

"We see tremendously powerful interests constantly knocking on our door, trying to charm us," said Gloria Molina, a council member.

Probably eight-year-olds were a tough audi- ence so what he decided to do was only flashy stuff, one climax to another, constantly knocking them dead.

He did not use care to avoid trees and branches, and his forgotten feet were constantly knocking against stones or getting entangled in briers.

People were constantly knocking on his door and he didn't like that.