What are your weird work experiences?

I went to use the bathroom at my job then in the corner of my right eye I saw a coworker crying with his pants down to his knees. He still had his underwear on but I just ignored him to go use the stall. After this I just pretended like nothing ever happened and he confronted me.

Weeks after this incident I was grinning while on my way to the break room. Then he saw me again and then he asked, “What’s so funny man?” 

I just ignored him again, (I was happy because it was almost time to leave). This all happened months ago.

I’m curious if anyone has gone through anything similar.