Is there a specific way to hit in American football that will give the target a concussion?

I was talking with a colleague about American Football (regarding injuries to the head specifically) and the topic came up about concussions. My colleague claims that there are specific ways to hit in Football due to which the target would get a concussion. I said most concussions probably come from accidents and are not intentional. He said that there still is a way to hit in Football that will give the target player a concussion. Is this true? Is there a specific way to hit in Football to give the target a concussion?