This ride's closing!

humorous: used to describe a situation when smth/smb will no longer be available for use

Rachel: We're throwing Phoebe a bachelorette party.
Phoebe: Yeah! Sorry, boys. This ride's closing!

Don't open that door!

used to say that it's better not to ruminate on something as it will only trigger the process of self-loathing

Chandler: What's wrong with me? Ohh, don't open that door!