Recently it was revealed that Jason also watched a Flying Grayson’s performance before Dick became Robin, just like Tim did.
That got me thinking. The circus was pretty famous and traveled internationally, the flying Graysons were their main number. So just imagine how many DC Characters may have seen Dick perform before he became Robin.
Clark took Louis on a date when the circus was in metropolis, and seeing those people fly made him remember an old Kriptonian tale…
Jim took Barbara and James Jr. back when they still lived in Chicago. James didn’t like it, but Barbara was so happy she asked to go again the next day, just to see the acrobats on the trapeze. She started gymnastics class after that, but will denie it if questioned.
Selina watched through a hole on the tend. She was a very young woman at the time, and just wanted to distract herself a little after a tough day. When she saw that little acrobat, she knew he had an abnormal pontential, even though she only saw him doing very simple tricks.
Hal Jordan watched a special presentation they did for the army.
Oliver Queen saw a privet performance before becoming green arrow.
The possibilities are infinite (of course, no one was as bright as Tim, the only one who was able to link Robin to Dick Grayson after having watched a single performance)