Slamming the phone the old way

I once did a voluntary year in a mental hospital and one of our patients had an anger problem. He used to throw his mobile phone against the walls and on the floor. But he had a special case for his phone, his fits didn't leave a scratch

I need this case, what was it?

I have no Idea, it was huge and made out of rubber so that it kind of bounced a bit when you dropped it