Honest question.

How do women lose a tampon in their vagina? I mean the vagina only goes up 4 inches, maybe 5 max. 
I just don't understand the women who say to go to the hospital when other women say they lost their tampon. How hard is it to reach up in there and scoop it out? It's physically impossible to lose it in your vagina, I mean unless your vagina unlocks into narnia, but then you probably have others issues to deal with.