He even gave the elephant in the menagerie26 a plug of tobacco, and the elephant didn't knock the top of his head off with his trunk.

他游动物园时居然塞给大象一捆烟叶，可那大象也没有甩开长鼻子敲碎他的脑壳。

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Often they are sealed in cages so they don't knock someone's head off when they swing a steel arm.

它们往往被封闭在铁笼之内，以免钢臂挥动时磕碰到旁边的工人。

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The only worry for the Warriors was the injury to Phelps, who was stretchered off after receiving a nasty-looking knock to the head.

BBC: Wigan 30-14 Bradford

Birmingham had Barry Ferguson to thank for clearing the ball off Utaka's head after a knock-back by the impressive Piquionne, before Seb Larsson forced James into a tip-over at the other end.

BBC: Portsmouth 2-0 Birmingham

Your Wilson Pro H22 tennis racquet quickly became a drying rack for your underwear once you found out that the college tennis team was filled with power-hitting recruits from Estonia and the Ukraine who could knock a flash drive off the top of your head with a backhand.

WSJ: Rob LaZebnik's Message for the Class of 2013 | Saturday Essay