He'd had a bad concussion during the battle, and for while the doctors weren't sure he would survive.

Ten days of the time I had spent in the hospital, at my own expense, getting over a bad concussion.

He had a pretty bad concussion - his speech was affected, although his thinking seemed clear enough.

You've got a bad concussion- you ought to be in bed.

It was a bad concussion; maybe some bleeding, inside the skull, that caused pressure.

After a hasty examination, the doctor said that the man had suffered nothing more than a bad concussion.

He has a bad concussion, and he's being treated for shock.

She still had not regained consciousness, but the reason, he was sure, was nothing more serious than a bad concussion.

The third must have had a concussion or something worse.

The kid's father had a bad concussion and never was quite right after that.