Grabbed the rear brake last night and the lever went straight to the bar and then didn't return back to its normal position. I thought, oh crap, did one of the pistons pop out? The pads had been low for some time... Nope. Pistons in the caliper were poking out a little, so I pushed them back in and the lever didn't budge. I tried pushing some fluid in from the caliper side, but that just ended up creating too much pressure, popped the hose off the bleed nut and got fluid everywhere. Retired to the bong shed after that one.. Is the lever hosed? Should I even bother trying to fix or just buy a new one?