Neodymium Iron Boron magnets are very powerful compared to old ferrous magnets, but what catches people out is not the increase in strength but the inverse cube law of attraction.
Mild squeamishness warning - there is a pic but I suspect the graphic stuff is in the further link.
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So when will you be demonstrating the Neodymium magnet gun and can I stand well back?
I wouldn't worry - the default targetting mode is radiator seeking...
HAHAHAHAHAAHHAHAHA!