Hydraulic Press safety questions

I have used a lot of presses in my 20 years in the A.F. Most had a thick piece of plexi-glass mounted on the front of it. Hinged at the top with a long "piano" hinge, and a prop rod on either side to hold it up while positioning anything your working on. If anything broke and went flying forward, it would stop or slow it down. Would be cheap to add to most presses...