What is the meaning in a dream of classroom

I dreamed of spraying liquid nitrogen on people, classroom setting

Simon Pegg and my old teacher were performing the lion king in a school classroom

In highschool classroom and hallways and often during the dream beginning to lose the clothes I'm wearing until fully naked and embarrassed or sometimes fully naked to start the dream..sometimes running in the hallway and it's packed with other kids..former classmates who I was never close with tend to be the ones I remember from the dream.