Seen some head up S-VHS of a Jag being rolled at below 350 Knts, the rolls being done as the aircraft was under restrictions in speed for op reasons, but with a backseater engineer onboard (and the explaination that aeros in a Jag were more comfortable above 400 knts). Also seen Nutlooses loops, 4 G and 10K ft of airspace is not an overestimation..
