Hulk Thighs

So today in the squat challenge I had to do seventy squats. I walked a quarter mileish and got started. I haven't started breaking them up yet so I powered through and was so happy at the end. Yes! I did it! But when i took a few steps away something strange happened. I swear the muscles on the tops of my thighs felt bulky and tight. Literally like I was hulking out our something!