I once got out of my car after doing leg day and both of my quads seized up on me and I just stood there holding onto the car roof for a good 10 minutes. It was awful. I couldn't bend my knees. Finally I just bent my waist and let gravity take me into the front seat . Some couple walking by just stared at me like wtf. I'm like oh jesus, but I didn't care. Finally I managed to get the old quads to quiet down. just terrible.