Perhaps it's better to explain it in English--Une choc extrême, an extreme shock--I think it's intuitively obvious that if you were riding in the back of a LAV III and it blew up and killed the guy next to you, if you survived, then you have lived through a certain shock. If you were involved in a firefight and one of your best friends was killed, that's a shock. If you're a woman walking through Central Park in New York and you are gang-raped, that's also a physical and an emotional shock.
On February 7th, 2008. See this statement in context.