This Monkey Couldn't Believe Its Eyes

This man performs a magic trick in front of a monkey at the zoo, and its reaction is priceless.
At first, the man shows the monkey how he places a tiny object in the cup, before putting on the lid and giving it a little shake
And quickly, while the monkey isn’t looking, he empties the cup onto the ground.
The man lifts the cup back up again, before giving it another shake, and placing it down in front of the monkey