Most Embarrasing Moment Ever

Was at the gym that day. There are 3 floors at my gym and i was at the topmost floor.
So anyway i'm making my way down all the flight of stairs, you know, minding my own business when I reach the ground floor ( which is where the washroom is)
Only i DONT know its the ground floor because i wasnt paying attention to how many flight of stairs i'd already taken on the way down and also because you cant actually see which floor you're at as the stairs are separated from the workout rooms itself ( if you get what i mean)
Anyway, there I am making my way down another flight of stairs when i really should have stopped and got out.
There is this huge group of tall, Australian guys there apparently taking a tour of the building with this snobbish Asian trainer that me and my friends all hate. they're all standing at the foot of the stairs and I'm feeling a bit self-conscious as I'll have to cut through the group to get to the next flight of stairs. So i'm walking with my head down and hoping and praying that my hair doesnt look like too messy and that i dont have a sweat stain on my butt or something. I cut my way through the group all the way muttering 'Excuse me's and 'Sorry's.
As i am going down the next flight of stairs, the trainer suddenly calls out to me ( Quite loudly too i must add)
And he says, "Hey sorry, but thats the Male's washroom"
And thats when i remember that the last flight of stairs down leads right to the male's washroom, nowhere else. And also thats when i realized that I missed the first floor and was headed straight for the Male's washroom.
So i've got this whole group of guys staring at me now probably wondering why I would be headed to the washroom and boy, I wished the floor would just swallow me up then and there.
What else could i do but cut through the group again with my excuse mes and sorrys to get to the first floor????
I was so so so so embarrased then and was cursing the stupid insensitive trainer all the way to the FEMALE washroom.
Jerk.