Muffins may have caused knee pain and locking up.

“two days after this whole muffin experiment I couldn't walk I was in a grocery store and I was like walking down the grocery store I was like oh my knee is hurting and my knee hadn't really heard since I was a kid oh my knee is hurting and I was walking down the grocery store aisle and I was like my knees locked up and I spent the next two days in bed and that was like because that never happened I was like okay that had to be the muffins because this hasn't happened since I was a kid”