BTN Press. Even though lots of people love it, it's one of the worst positions to put your rotator cuff in, just very unatural. You will probably never have to press that kind of weight, in that position, ever. Similar to bench press where you'll never have to press weight off you chest while lying down on a bench.
Both are usually caused by bad form. And not just one occurance, over time bad form will chip away and do damage, and then one day it hits. Just ask.., oh wait, me. I had mediocre form for years, then I busted up my shoulder on the bench. Still recovering today.. so going forward, lower weights, pride swallowed, rebuild slowly, and properly.
Mt Snow, VT - May 5, 2012 - Completed!
Gunstock, NH - June 1, 2013 - Completed!
...i remain, he who remains to be...