Common name. Can be a moment or a situation. It happens when you get betrayed in a soft way by some of your relatives or friends. It can also happen when, for unforeseen reasons, you find yourself unable to finish what you had to say or do.
"I got a Truman with that girl last night... I waited for her but she never came"
"He has got a Truman as he was explaining why he was sad. A noisy airplane was flying just above him and nobody paid attention to what he was saying"