Many...
I never got to view a TOC in person, but I did see many videos, and followed it closely. It may not be like actually being there, but it was awe inspiring just the same! How about some of these?
A 50% Laser For Mr. Bennett
The Circus & JR Line of Radios
The Circus Circus Emblem Itself
Awe Inspiring Manuevers That Were Firsts (too many to list)
Clouds Of Smoke
Cheers and Yells Galore
The Cristen Eagles Aerobatic Flight Team
Patty and her absolute perfection
A "Big Red" F-18
The Saharra
The Myriad Of Things That Mr. Bennet brought to our hobby through the TOC
...and then there is is one of the biggest...Mr Bennet himself. The man always impressed me even though I never had the privelege of meeting him. A whole volume could be written on what the man did for this hobby! There are many many more, but these are just a few that passed through my head.