Yes or no wheel

This wheel has two equal segments and lands on each half the time. The answer is drawn from the browser’s cryptographic randomness before the animation starts, and the wheel is then turned to land on it — so the spin is presentation and nothing about the motion influences the outcome.

The useful thing about a coin or a wheel is not the answer but your reaction to it. If the wheel says no and you feel relieved, you already knew. This is the version of that trick with a large animation and a history of what it has told you before.