Oh, now I do remember catching my finger in the chain.  And yet, I'm still here. . . with all-10 fingers.  Maybe we were just hardier back then.  I stepped on nails and a broken Coke bottle.  Oh, yeah, did I mention we used to run around barefoot or with thongs?  (That's what they were called back then.)  We used to eat earthworms and dirt pies.  How did we ever survive?  I'm not being facetious, either.  We also never got food-borne illnesses from lettuce or fruit.