Coin flipping!

I want a player to be able to flip a dime to get heads or tails as a result

How I imagine this:

• Player holds right-click while holding a dime, the dime will then do the bow-pull animation
• When the player releases right-click, the dime will vanish from the player's inventory (imagine it being in the air), the time it stays gone depends on the time the player held right-click.
• After an X amount of time, the dime will reappear in the player's inventory (catching), and the word "Heads" or "Tails" will be printed in the chat depending on random chance.

I shelved this feature originally because I had issues getting the vanishing-reappearing to work bug-free. When a player switched inventory slots or took another item in their hand, the dime would sometimes not reappear, or duplicate.