According to Osho, when fear arises in the third stage, do absolutely nothing: surrender totally—‘die’ to yourself. Drop all attempts to save or control; silently slip like a dewdrop into the ocean, letting the ego dissolve. Trust the light and allow the ‘great death’ (samadhi) to happen. Recognize fear as natural; if possible, rely on the presence of a master to help you cross without turning back.
When fear comes, stop doing and completely let go—like a drop falling into the sea—trusting a guide if present.