"Getting thrown off" is pretty much where a
most injuries occur.
Common injuries are falling off ladders, dropping or jabbing a held
tool, or slamming a limb into something sharp in reaction to the
shock. Or, in some case, throwing a tool or fist and hitting someone
else.
IMHO this is also the main hazard from the stored charge in CRTs.
Although the voltage is high, there is not enough charge/energy to
kill you (if you have a heart problem, that's another matter, of course).
But the shock from said charge is enough to make you jerk, and maybe
either break the glass of the CRT (by hitting it with the tool you are
holding, say) or drop the CRT.
-tony