Morning's Light

This office has two single-person restrooms located next to the employee entrance door. More than once, I've uttered some words that would be highly suspect if heard out of context, say, as you pass the restrooms.  These include:

• "What is THAT??????"    [asked while seeing a big spot of mocha on my shirt that I didn't know was there.]  followed closely by…
• "How did that get THERE???"

Hmm..I thought I had more.  

What are some statements you think shouldn't be spoken in a restroom or overheard in general?