One memorable co-worker experience was this dude sat on the next desk who was having a conversation with his mum which suddenly turned into him screaming MOM IF YOU SAY THAT ONE MORE TIME I SWEAR I WILL NEVER SPEAK TO YOU EVER AGAIN! [click]... returns to his work. I stare intently at my screen. I thought about telling him to not do that in the office but I figured he was going to be leaving soon anyway.