Here is method 2:
Change the box collision size as much as you need and drag it into position.
Also two things about this box: first you can change the box collision settings in the menu to the right to only overlap certain things. you wont need a little part of what i did in here if you do that.
if you do what i said earlier you dont need anything other than the overlap event. just drag the exec and do whatever you want. what i have done in this is just make sure that whatever we are hitting isnt a pawn.