One of Ansett's 747 captains used to be in our aerobatic club. He finished up as their 747 sim trainer/test captain and had a great story about unusual attitude training. Due to that infamous 20,000 foot barrel roll done by that Chinese 747 coming into LAX years ago, he had his 747 drivers go through unusual attitude recovery in the 747 sim. He'd start them out in a inverted 45 degree nose down dive and tell them to recover. Now, the 747 is building up lots of smash (speed) in this situation and every pilot who had not done aerobatics pulled through (simply pulled back on the yoke) and ended up going pretty well supersonic (well, as fast as a 747 can go vertically down!) and they ended up crashing.
Generally, the pilots who had done aero's simply held that inverted line and rolled (slight forward yoke and roll - not sure if any bottom rudder used, but it would help - may not handle the loads though??). It was a great example on how unusual attitude training can help pilots who fly the worlds biggest aeroplanes - when things go wrong.
Years later, GFS Flight Training (now Oxford) was instructed to give its QANTAS cadets 5 hours of aerobatic/unusual attitude training - just to get them used to what the world looks like from different attitudes - other than straight and level. I know the RMIT students at Pt Cook also do aero's as part of their training. They have a lovely red Super Decathalon down there for this purpose.