duh...

I think I am getting old and stupid!

I went up to 25th floor, which my card has no access to.

At the midst of the meeting, I went out to the toilet.

Inconveniently, the toilets were located out of the security door.

I went on outside and tried my luck with my card.

Bzzzzz!!! No access!

Just when I were to call my collegue, a guy came out and helped me with the door.

Me: It's so inconvenient to have the toilets outside.

Guy: Yeah!

Me: Thanks for helping me with the door.

Guy: No worries! You can actually leave the door open while you are out to toilet.

Me: duh...

So simple yet I never think of that!