Re: what did you do to your motor bike today?
spokes and nipples can strip out, especially on soft steel spokes (like old schwinns).
Sometimes it's just needed to experience how much tension is required to keep them put. I like to use rubbing alcohol to "lube" the spoke threads, and prevent spoke twist with a padded pliers.
1" roller Dax Friction Drive and Tanaka 3300 with mods.