According to Osho, yes—any method that abruptly interrupts mechanical habits, like Gurdjieff’s ‘Stop’ experiment, can be used; what matters is the jolt into watchfulness, not the ritual itself. He sanctions flexible, moment-to-moment devices whose sole purpose is to bring you back to presence and reveal the silent witnessing consciousness.
Yes—using a sudden stop, or any trick that snaps you out of autopilot, is fine if it helps you notice you are aware.