I used to have hundreds of those little buggers (as well as the cheap knock-off versions)!
We were easily amused back then. I had the wrestling ring for them... The big building-looking dude was practically invincible because his leg fit in snugly... The rest of them fell out instantly or were too oddly shaped to fit.

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"Man lives in the sunlit world of that which he believes to be reality. But unseen by most is an underworld, a place that is just as real... but not as brightly lit... A DARK SIDE!"
-opening from Tales From the Darkside