I hate being caught meditating

Every time I meditate and hear someone approaching my room, I immediately stand up and pretend I was doing something else. I don’t know why I do this. Maybe it’s because I find it awkward imagining someone walking in and seeing me just sitting there in silence. Like, what if they say, “Umm… hello?” and I have to snap out of it and acknowledge them?

I don’t know, it makes me uncomfortable.

EDIT: Wow, thanks for all the replies. I’m getting a meditation sign to put up on my door when I meditate. Let’s see how it goes. :)