Your question implied where you were going with it (as did mine).
Answer? If it was me my thought would be "Jesus is here - follow Him." But it wouldn't be some hypnosis, mind control, or puppetry. "Drop what they were doing and immediately follow Him" does not imply lack of free will.
You need to understand that Calvinists believe we all have a will to choose , but unregenerate man will never choose to follow Christ ,Gods grace must precede the choice to follow him.