I had one break just under the threaded ring. Pushed it together and rode 2 miles home with most of the bearings gone. Pedaled slowly without coasting. Kinda treated it like a fixed gear so the pawls stayed engaged. That was 30 years ago. I don't think I would've tried that today.

Edit: I remember it also put a nice gouge in the large alloy spacer on the axle of my Campy record hub. I'm pretty sure I still have that hub. I'll have to look for it