Pig question

I was going to setup over a feeder on a lease we had in Runge a couple years back. It had been raining and everything was soaked and it made for quiet walking.

I had my rifle slung and walked up on a red spotted hog laying in some Johnson grass. It was laying down , but sitting up real tall. It's backbone was sticking up and it looked like a poor sucking sow.
I was maybe 10 feet away and I didnt really want to shoot a poor ass sow that close with a rifle so I just stood thee looking at it. Directly one eye popped open and it jumped up. It was a tall rangy boar that damn near came up to my belt. He took off and I was so surprised I didnt even get my rifle unslung.

I think they go into a sound sleep and dont pay attention to what's going on around them.