Fustwation is the worst!

I was walking out of the gym the other day and there was a woman and her 3 year old son walking a little ahead of me. He was trotting along, then all of a sudden, he stopped dead in his tracks, dropped his mother's hand and said, "I just can't do this!" His mom asked, "Why not? What can't you do?" and he replied, "You make me so fustwated!" Then, elbows flying and booty swinging, he stomped his way out of the gym.