the next day, sulley and mike put a monster costume on boo before taking her to work so that nobody will think that she is a human child. in the lobby, mr. waternoose tells sulley to stop by the simulation room to show trainees how scaring should be done. sulley and mike go to the scare floor to see if her door is there and it wasn’t. then, boo runs off and sulley looks for her. however, mike couldn’t follow him because celia got mad at him for ruining their birthday dinner. he tries to kiss her, but she slaps him. he then runs off looking for sulley. randall stops mike and asks where boo is. after mike finds sulley and boo, they go back to the scare floor and find her door there. mike goes into her room and jumps on her bed. randall then captures him, sends the door back to the warehouse, and takes him to the basement.