bleed out problem

Hi All,

I have caught about 60 trout out of my favorite
river this year. I have noticed on two trout
this year that I hooked in the lower mouth to
the side of their tongue, that they act completely
normal -- jumping, running, splashing around, dirty
looks -- until I pull my TMC 200BL size 12 barbless
hook out of their mouth.

Then, suddenly, they bleed like hell (a lot of blood),
roll over on their back and act really weird. I
pushed both of them out of the water with my rod tip.
They manager a little wiggle here and there but
no forward movement. (They both wound up on my
dinner table.)

Anyone know enough about trout anatomy to say what
is going on here? Did I puncture a main artery
and the hook just kept it plugged? Did
pulling the plug stun them? Any ideas?

It is better than gut hooking the other 58 with
bait, but I am a bit puzzled. Maybe the Lord
wants me to eat a few of them every so often.
He did make them awfully yummy after all.

Many thanks,
-T