Mines like that really exist. Have you ever seen "Behind enemy lines" where the russian soldier steps on a mine that's barely sticking out of the ground? Just be thankful that nexon hasn't incorporated a map with lots of leaves or rocks on the ground... mines would suck then.
All you have to do is be situationallly alert. Make sure to take it slow at points which are obvious mine spots (stairs, outside door entraces, flag zones, heavy traffic corners).