Bunk Bed Arrest

So, there was this cop on the top bunk of a bunk bed.

Another cop walks in and sits on the bottom bunk and the cop on the top bunk bed said, "You're under a-rest."

Explanation

Explain Bear

Alright, listen up, buttercup. So, a cop is chillin' on the top bunk, right? Another cop comes along and sits on the bottom bunk. The cop up top then says, "You're under a-rest." Get it? "A-rest" sounds like "arrest." You see, officer? I would love to see you try to understand quantum physics. Just kidding... I don't want to see that.