They say that one of the most exciting phrases to hear in science is not "eureka!" but "that's funny."
Who is the "they" who said this? It is the most ignorant thing I've heard today! It is the difference, to paraphrase Twain, between a lightning bug and a lightning bolt. "That's funny" is a significant observation; Eureka! is a celebration, a dance, to an personal intellectual achievement. One cannot sit still in such moments, one shouts, screams, runs in circles, speaks in tongues, laughs uncontrollably and like that.
"That's funny" is simply observational. There is no celebration, just collection of information which may spark curiosity. That curiosity, if acted upon, can become understanding, which, after further work, can lead to a Eureka!, but they are in no way comparable.
Perhaps not everybody has had a Eureka! moment, but most people have had a "that's funny," so they may not see the difference.
Euekas are orgasms of the mind.