It sounds like the departure from the top of the inside loop was essentially a snap roll. I did something similar recently in a Giles 202 when I managed a complete 360 degree snap at the top of the loop, then carried on with the loop. This is technically known as an "Avalanche".
I'd like to claim it was skill but in fact I just heavy handed - the Giles has such light controls (and I fly a Pitts S-2C) that I pulled fractionally too hard and tip stalled...
But if the stick is back, it should be an upright, not an inverted spin...