I was mowing along and pressed the brake pedal, and the whole operation bound up! The brake pedal jumped, the rear end bucked! Tested a couple more times going very slow, kept happening. Shut her down and crawled under for a look. There are two large bolts on the front of the rear end that wiggled loose (blocked from falling out by the bracket that connects left and right brake rods. I attempted to retighten them but they were both stripped (or broken)

Also the pto won't disengage now, probably bound up from rear end out of alignment?
Thanks for any thoughts on this.
Ol'Yeller