On the 25AXP22 that imploded on me, the safety plate acted just iike a windshield - broke into a million little pieces, all stuck to to the face of the tube. Mind you, the tube also broke into a million little pieces with a big whoosh, but no high-velocity glass shards. It was if I had broken a large glass jug, but with the whoosh of inrushing air.
Here's my only experience of an imploding tube, in 34 years of being in the TV repair arena:
http://videokarma.org/showpost.php?p...0&postcount=18