BOSTON (AP) — After one of the best programs of a career that already includes three national titles, Jeremy Abbott nearly did a pratfall.He would have been entitled following a spotless performance highlighted by three picture-perfect jumps, smooth spins and almost celebratory footwork in a short program victory Friday night at the U.S. Championships.Coming out of his final move, his excitement overtook him and Abbott lost his balance. And when he saw his U.S. record points total, 99.86, a look of amazement dominated the 28-year-old veteran’s face.“I went through all my history here,” Abbott said. “I tried to live all of it but stay in the moment and just enjoy what I was doing, each crossover, each step.