Worst episode of shear I ever faced was when I was younger, probably within a year of getting my license. I decided to go out to the airport late one night after the tower closed. Storms had rolled through earlier in the evening. The ATIS was a couple hours old, warned of shear, but I figured that was earlier and the wind was normal on the ground.
Got out the 172, and decided to do some night hours. As soon as I got of the ground, it was like riding a bucking bull. The plane was up, down, right, left, all over the place. I went around the pattern and got lined up on on final. I think MLI had about 9,000 feet of runway then. It took me over 7,000 feet to get the airplane back on the ground. For those not familiar, I can typically get a 172 on the ground in less than 1,000'.
I abandoned my night flight plans and put it right back in the hangar. I think I stopped sweating about the time I got home 20 miles away.