In June 68 during the making of the BofB film, Connie Edwards and I gave a little display at Debden for their open day, he in a Bouchon, me in a Spit Mk2. I think all we did was a gentle low level tailchase over the aerodrome, but no doubt it included the odd aileron roll, with wing overs at each end. I don't think any vertical manoevres were included, though it is a day or two ago now, and I can't really remember. He would have been leading, with me on his tail, since this was for a British audience. We had to cut it a bit short because my very old Merlin began to overheat!
I'm really making the point that we didn't try and do skilfull slow rolls, with negative G and all, because the occasion did not demand it. Neither, I would suggest, would the average victory roll have been.
Incidentally, I don't recall any goats in cockpits, and if I did I'm not naming names!