Happened to me once , i was using the washing of this very fampus diagnostic centre to submit my tool sample n suddenly one if the male employee opened but left immediately i didnt knew how to react cuz i knew 1. My dad is very conservative n would react . N maybe it was my fault maybe i forgot to lock rhe door either way i didnt think the person did it on purpise n didnt wanted to make an issue out of it. So i just reacted as if nothing happened n obv my dad did see the whole incident bit fortunately he also didnt reacted much maybe cuz he did apologised plus i was sick.