As a young fella and at the time, under training for my MEIFR, (completed rating a month or so later) I departed YBTH to the north on a NVFR flight in the early hours, (4.30am local) solo in a C210 and quite vividly recall suffering somotogravic illusion, I definately felt like I was pitched way nose up. I forced my self to believe the instruments that I was in a 800fpm climb and accelerating quickly through 90knots, as I recall it took another minute or so until I was feeling like everything was normal and I was game to look away from the instruments
Being under training for my MEIFR I was, I guess in the best situation to realise it. I also feel all the crash comic stories I'd read over the previous 2 years or so helped. ALL student pilots should be reading these old mags as a MUST do when learning to fly, us older pilots should also re-read and learn from them.