 forgetting names of cabinet members, shaking hands with Casper the Friendly Ghost on stage, shaking hands with the air, in essence, not knowing where to go, falling off his bike, falling on stage at a graduation ceremony, falling, going upstairs. People usually fall going downstairs. Somehow he falls going upstairs. Then they shrank the steps at Air Force One, so it's now the baby steps. Then aides flanked him when he would walk from Marine One up the South Lawn into the White House.