A little strange to say the least

I've dispatched hundreds of squirrels in my lifetime, but this mornings event was a little strange to say the least. I had two squirrels on the bird feeder this morning and had time to shoot them, but not time enough to set up the camera. I shot the first one right behind the eye passing through the brain and exiting in the same orientation on the opposite side. It slumped and never kicked, just remained flat on the feeder. The second one ran to a nearby tree and I had a straight on top of head shot. I hit him directly on top of the skull through the brain with the .22 pellet and he too fell and hardly flinched. I went to retrieve them and the second one that I shot through the top had brains hanging out about an inch. When I touched it to pick it up I noticed even though the eyes were closed, it flinched, like a slight blink though the eye was closed. So I gently touched it again and it made the same blink though the eye was closed. On the few occasions that I'm not certain a squirrel is fully deceased I generally step on the skull to crush it. Sounds gross, but it's effective. When I did that it grabbed my shoe and flailed a bit. All simply random nervous activity??? Spooked me ! A little unnerving! 
I didn't expect that with the brains out. I guess anything can happen. Has anyone had a similar experience?? Though I've never had a reaction, I was always taught to touch a deer's eyeball with the tip of my barrel before handling it. Good advice on large game!
 
Those squirrels are tuff little creatures...
I shot one in the head and left it laying for a hour or so before retrieving it...
I could tell thru the scope that it was not breathing so no second shot needed... (so I thought)
Well darkness fell in and I went to pick the dead squirrel up... boy was I wrong.. I always pick up by
the tail, this guy decided to try and latch onto my arm, scaring the heck right out of me.... I did not expect that at all.
I must say he was very much alive... so second close up shot was required... I learned my lesson on that one... 

;-)
 
I carried one in my game bag, along with others, all morning a few years ago, I kept hearing a slight noise and couldn't figure out where it was coming from, I have hearing loss and it's hard for me to judge direction. When I got home and started pulling the squirrels out to clean them, one of the wasn't stiff, guess where the sound was coming from! I couldn't believe that sucker was still alive, it had been at least 4 hours!
 
scubjeeper- My younger brother opened his dove bucket after a shoot as we got home and were about to clean them. He took off the lid and one flew right on out and off into the sunset. Must have been stunned. But, that wasn't nearly as bad as the one he left in his bucket after the season one year. My parents had to remove half of the stuff in his room trying to find the source of the odor. When they opened the bucket it was horrible.

ajshoots-You may call it redneck guessing, but that's a darn good explanation. Like billydjann said, they are definitely tough critters.