Honestly, I don't know. If your armed, of course, then you have some chance to avoid injury. I seriously doubt a backup blade would have done much good. Its a sad situation and people should realize that keeping 200lb monkeys and tigers and bears is ill advised.
From what I understand it trapped a LEO in his car and then proceeded to open his car door when the cop double tapped it. Also, heard some of the neighbors reporting that this animal was NOT friendly and this was a problem before all this happened. Imagine living next to a 200lb monkey who hated your guts.
Sad situation.