See the news clip and read Washington's Blog Summary of the Attack.
Here is a brief excerpt of Washington Blog's Account:
"Professor Nathan Brown of UC Davis notes in open letter to Chancellor Linda P.B. Katehi:
'When students covered their eyes with their clothing, police forced open their mouths and pepper-sprayed down their throats. Several of these students were hospitalized. Others are seriously injured. One of them, forty-five minutes after being pepper-sprayed down his throat, was still coughing up blood....'"
Majia Here: Washington's Blog has provided excellent coverage of these type of horrific abuses by US police at OWS demonstrations.