Basic Carrera Magnet Question

Sometimes it's the simple things that stump me, and perhaps this is merely another case of that. :oops:
I recently bought a Carrera Dodge Charger and would like to pop out the rear magnet, however the chassis is of the style that has that curved plastic pressure bar holding it in place, like this one:

I've yet to successfully remove one of those magnets beneath the rear axle without breaking the plastic bar that holds it in place. :(
:?: What's the trick, fellas?
I recently bought a Carrera Dodge Charger and would like to pop out the rear magnet, however the chassis is of the style that has that curved plastic pressure bar holding it in place, like this one:

I've yet to successfully remove one of those magnets beneath the rear axle without breaking the plastic bar that holds it in place. :(
:?: What's the trick, fellas?