A Midsummer Night's Dream: Act III

In Act III of A Midsummer Night's Dream, Puck runs into the craftsmen practicing their play. When Bottom is waiting to go on stage, Puck sees how annoying he is and takes the opportunity to give him a donkey's head. When the other men see Bottom, they run screaming. Bottom is wandering in the woods, and is right by Titania when she wakes up. She falls madly in love with him and orders four fairies to be his servants. Oddly, Bottom is not at all surprised by Titania's strange love for him. 

Later, Oberon realizes that Puck put the love juice on the wrong man, Lysander's, eyes, causing him to fall in love with Helena. Puck then makes Demetrius fall in love with Helena, so both Lysander and Demetrius are following her. Helena thinks they are both playing a mean trick on her and lying about their love. When Hermia runs into them, shocked to see her faithful boyfriend suddenly hates her, Helena thinks Hermia is in on the joke too. 

However, Lysander and Demtrius are very serious and plan to fight. Oberon does not want them to fight, so he has Puck trick them into going far away from each other then falling asleep. He then puts a different potion on Lysander's eyes to have him in love with Hermia again.