It appears that the 407 was indeed rolled & looped.
Although the 407 manual clearly states NO aerobatic manouvers, or intended aerobatic manouvers, I guess that some pilots just have the nack to execute these manouvers without killing themselves, either due to incredible knowledge, competence and ability, or plain stupidity. Only the pilot can tell.
"Mighty Gem, you posted a question about what is defined as an aerobatic manouver in terms of angle of bank/nose up and down attitude".
I spoke to a reputable Air Force instructor, and they teach their pupils that any nose up or down pitch beyond 30º, and angle of bank exceeding 60º, may be construed as an aerobatic manouver. Helicopter Combat pilots should be able to tell us more about these manouvers, as I am sure the "old Cobra", (Bert's baby) the Apaches and other combat helicopters do have advanced "aerobatic" manouvering capabilities.
Specnut727, you should be able to execute a roll in your fixed wing aerobatic airplane without pulling any G's. If you're pulling 1 G your getting there, but the ultimate is not to pull a G during a well executed "barrel roll".
Good luck & safe flying!
