A Merry Chase and What A Mess: Burn the Trash are side quests that you can unlock during the Directorial Override. Both of these tasks (in Control) are very short and their walkthrough has been prepared in the following chapter.
A Merry Chase
A Merry Chase begins in the hall with bridges. On the left there is a small room where the red light flashes. Go in there and stand in the middle of the room. The floor is going to break apart under your feet. This is how you will reach an area filled with levitating platforms. At the very end you will find a toy horse with which you need to interact.
This will take you to the next area. This is a linear sequence in which you have to overcome next obstacles and opponents.
What A Mess: Burn the Trash
What A Mess: Burn the Trash is a job you'll get when you talk to the janitor. You have to burn six barrels of waste to complete this task.
Go to the power plant. There you'll find a room with a huge stove. All barrels are in the same room, so you'll have no problem locating them. Use telekinesis to move them.