If you ever have a chance to see Jim LeRoy in his highly modified Bulldog Pitts, you'll be amazed.
This fellow (from California, but he does shows nation-wide) does the same astounding aerobatics you'll see Wagstaff or Tucker do, but he has a few "twists" to his act.
As a pilot, the one I appreciated the most was a low altitude--maybe 30 feet--run in followed by a group of quick aileron rolls ending in different attitudes. He'd do a double roll, then end on inverted. Quick, another 3/4 roll to 45 degrees left, immediately followed by a 2 and a 1/2 to 45 inverted right. And he just kept dong these combinations. Bam, bam bam! All rolls at about 360 degrees per second, all stopping RIGHT ON the bank angle, and never varying from his run in altitude by two inches. Gawd, I was impressed.
I couldn't do that even if I was enroute to the innevitable accident.
Second, every pass that wound up at low altitude would end up in a 45 degree inverted position. Then he'd PUSH his way into the vertical with a 4 to 5 negative G move. Every time he'd do that the pilots standing around me would groan in sympathetic pain. My eyes were darn near bleeding at that point, and I was only watching.
He's good. Dang good...