conv: I knocked on a closed bathroom door and no one responded. But_comma_ when I opened the door_comma_ someone was using the bathroom.  I can't believe I walked in on someone using the restroom.  Oh my_comma_ that must've been an embarrassing situation! It was! I knocked first and no one answered_comma_ so I thought it was okay to go in.  That's ok_comma_ you did the right thing. It probably happens to lots of people. Thanks_comma_ I'm sure it does haha