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Simple, elegant, and powerful
Stopwatch Magic Effect:
Force any number up to 99 using the spectator's borrowed phone. Ask them to click the "stop" button of the timer and use the milliseconds as the number.
Works every time and can be used on your own phone, but is much stronger when it's a borrowed phone (Apple).
Precise timing with magic
Scrolling magic tricks
Master the stack
Countdown with precision
Wake up with magic