4:07 looks like a tight cross controlled inside loop with a lot of sideways travel and then an outside tumble that paused briefly vertical which was a nice exit. Feathering the prop at 7:12 for a tail slide and then getting low and slow with no engine for 30 seconds inverted was a bold experiment. That's cutting it very close to no speed, no altitude and no options. You know what they say about old bold pilots.
