In the melee that followed, a policeman on horseback knocked out two of Apotheker's teeth.
But this new type of technology could have prevented the 2003 blackout that knocked out power to much of the Northeastern United States.
State institutions were already weak and dysfunctional in Haiti before the earthquake knocked out the capital.
Now, dig back to recent history's potato famine in Ireland, where a blight knocked out the whole crop, which consisted of just a few varieties, and millions of people died of starvation.
He has a formative early memory of hearing audience laughter, as a five-year-old at a clown show, and being "absolutely knocked out by it".
The boxer was knocked out in the second round.
In the finals of the boxing championship he knocked out his opponent, who was carried out of the ring.