From The Truman Show, where he drives around a cul-de-sac several times with no other cars in sight, and when he tries to leave, cars come out of every side street and block him.
adj) pertaining to someone who knows all but knows nothing
v) to explain things to someone who knows all but knows nothing
adj) "He seems to exhibit very truman behaviour"
v) "We need a truman move for this guy, he knows too much!"