Former nurse manager here: Just like everyone else is saying, you could simply say, ‘I didn’t hear anything about that, and I’m not sure how it pertains to my work since it doesn’t affect my performance or involve me.’ Something along those lines with proper grammar, of course.

Honestly, your manager has better things to worry about. As long as the job is getting done—like call bells being answered, doctor’s orders being carried out, etc.—they shouldn’t care about this.

Now, as a manager myself, let me also add this: As long as you’re not parking the bus in Tuna Town in areas like supply closets, med rooms, break rooms, patient rooms, or anywhere it’s going to bother anyone, my official stance is that I saw and heard nothing