You'll have to excuse the Village Idiot Frank...or whoever the dork is!
Those magnet mounts are notorious for
not having the strength to hold on at
speeds they are often rated for!
If you are serious and want to keep using
the radio in the vehicle, look to use a
mirror mount or a triple magnet-mount
or quad magnet for best results. Magnet
mounts can work good but a solid mount
is best, even if it is on a mirror. Good luck.

"Got RF?"