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I forgot to mention this -- last Sunday I went for a bike ride on the Ayer Rail trail. Lots of fun, but as we were biking along (casually, not pushing it but not stopping either), this guy on rollerblades swooshes past us. On top of his head was a handkerchief and atop that was his water bottle...which stayed rock steady as he blithely skated away from us like we were standing still.

One of the more amazing displays of everyday physical prowess I think I've seen.