I had to ride a Sag Wagon once when I was on a Century because a pedal bearing decided to fall apart around mile 70. Actually the outer nut must have loosened and fallen off and I didn't realize it until the pedal fell apart. I suppose I could have ridden just using the axle if I really needed to, but why?
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'75 Fuji S-10S bought new, 52k+ miles and still going!
'84 Univega Gran Tourismo
'84 Univega Viva Sport
'86 Miyata 710
'90 Schwinn Woodlands
Unknown brand MTB of questionable lineage aka 'Mutt Trail Bike'
Plus or minus a few others from time-to-time