Does anyone know how to take out a screw that just keeps spinning in place?

I accidently forced the screw thats used to secure the rear bumper on the sides, into the holes in the trunk area, which normally used wider and shorter screws...I forced the wrong screw in and now when I try to take it out it just spins in place.

 

the problem you are having is solved by getting something behind the screw head like a screw driver or set of dikes and apply out ward pressure then loosen the screw and ti will come out.

 

ok thks, i'll try that