In act three the actors are practicing for a play, Bottom leaves and comes back with a donkeys head that Robin put on him. All the actors run away in fear and disbeleif, Bottom thought they were kidding around. Bottom walks around the forest to try to look for the actors and instead sees Titania. Titania falls in love with him at first sight because of Oberon putting the flower juice on her. She calls her servants to do whatever Bottom wants and Bottom loved the attention.
When Robin returned to Oberon, he told him about Titania and Robin and about the guy with athenian clothes. When Lysander and Helena arrived and were talking Oberon realized Robin put the juice on soomeone else. Demetrius and Lysander were fighting over Helena,which Hermia was confused and Helena thought it was a joke. Lysander and Demetrius were going to fight but couldnt see anythingbecause of the fog. Robin changed his voice into Lysander's and Demetrious's tricking them. When they were asleep Robin took a different type of juice on Lysander so everything would be back to normal.
I predict Hermia will ditch Lysander cause of what he did.