I don't remember feeling it. My doula said, "Meg, reach down & feel" & I was totally surprised to feel his head was right there (I had no idea how far I'd progressed with pushing!)
Next push or so he was coming out, I did tear (just a little 1st degree) and that felt, well, exactly like I would imagine tearing in your perineal skin to feel! I said "F--- F--- F---" real quick & kinda low
but it only lasted a second. I totally forgot the whole "don't push as the head emerges" thing.
& no one reminded me to pause there, so I kept pushing with the ctrx as I had been for the past 40 minutes. I suspect pausing, breathing & resisting the urge to push may have prevented that little tear.
(Unlike lots of mamas, I totally could fight the urge to push! I had done so for 30 min while on the way to the hospital. It wasn't easy to resist, and at the apex of each ctrx - just for a few seconds, I couldn't fight it & felt my body push a little, but otherwise I could stop.)