Been riding since the early 1980's and had a first time weirdo experience.
Been commuting on a Benotto (1981) for a few weeks, keep tires pumped to 100/120 (120 fresh pump, get to 100 or so before re-pump).
Cruising in to work, and I cannot control the bike- twitching worse than a 1980's nightmare steed with a 90 degree head angle and straight forks.
Everything checks out, this is strange. I have already been close to getting wiped out twice since riding her.
The seat tube to BB repair is fine, wheels are true and centered, headset is adjusted perfect, nothing is loose etc.
This bike is now named "Christine", it is trying to kill me!