There's a first time for everything. When my wife and I were unpacking after arriving in Cancun, Mexico, we noticed that her suitcase could not be unpacked... It was locked with a lock we had never seen before.
Very odd... I tried the usual combinations... 0,0,0. 1,2,3. 1,1,1. Nothing. As I started fiddling with this lock, I noticed the bottom of it was marked by TSA.
I mean c'mon... what's the point of that? Locking my suitcase without giving me the combination? What a bunch of pranksters! Anyhow... I had the last laugh... Hotel "engineering" had some bolt cutters that came in handy.