Cross chains... okay. This tidbit should replace one of those un-useful questions on the written test for aspiring glider pilots.

I've added it to my list '1000 and 1 important facts that you should hope to stumble upon before you need them'.

As to premature termination of trailering, there is sure to be a guy out there who puts a 50 mm ball on his truck and then one day rents a U-haul trailer with a worn hitch. Here's hoping that he gets the word about crossing chains.