What is the most unexpected things you have seen working in IT?

As the title says, what is the most unexpected things you’ve seen while working in IT? I’ll go first: During my first year of beeing an IT apprentice, working for my nations armed forces (military) IT Servicedesk. I get a call from a end user, harddrive is full. Secured systems, not connected to the internet, and no applications for harddrive cleanup are approved. So I ask the user if we can go through things togheter. Young and unexperienced, we started on his user profile. Came to pictures. Furry porn, on a secured computer with no access to internet. Security incident team notified..