I just remembered several things in a very quick moment:
1) Always stay out of the line of fire. (I did)
2) Always wear a face mask. (I did)
3) Never spin a plate at 10,000 rpm. (OK, it was a wee bit slower than that.)
4) After the plate explodes, sit down and write about it before re-loading (I mean mounting another turning blank.)
All is well because of #1 and #2.