I can still limbo.
Heading home yesterday, I stopped at the subway booth (Museum station - one of the less-busy ones). But there was no attendant, just a little sign that read "Back Soon." So impatient me walked over to one of the turnstiles and, yes, limboed underneath. (These turnstiles, I quickly discovered, were definitely designed to discourage limbo-ing.) I had just about wriggled through when the attendant emerged from an unmarked door. "Hey, what are you doing?" he asked. "Trying to catch my train," I replied, pass still in hand." "Only asking because I had left the gate open," he said pleasantly.