When I was doing my right front wheel bearing, I was all done after a serious week of working on it slowly, and was drawing in the axle with a homemade "puller tool", which was an impact socket with an axle nut welded on the end, and the edges ground down so the threads could go inward, thread on the axle stub and pull it in to the hub as I turned the socket.

Well, the welding job wasn't too great and I was hitting the gym hard that week, so I torqued the hell out of the socket just a bit too much, and low and behold, the nut snapped off the socket, completely flush with the inside of the hub and the axle stub. Took about 3 hours of grinding notches in the broken axle nut, and trying to force it counterclockwise using a chisel to get it free again.

That was definitely an OH SHIT moment

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards