The extracurricular UnitasBerry workouts went on for years. In one of their sessions in '56, '57 or '58 Berry can't remember exactly Unitas asked what would happen if a squarein were called and a linebacker moved out to play Berry headup, a situation neither had ever encountered. They agreed Berry would fake to the outside, then run a slant across the middle..Something similar to what the San Francisco 49ers pulled off last time out would do just fine.The Texans try to snap a twogame slide on Sunday night when they visit the Niners at Candlestick Park.Houston jumped out to victories over San Diego and Tennessee to begin the season, but dropped a 21point decision in Baltimore prior to last weekend's 2320 overtime home loss to unbeaten Seattle.The Texans led 203 and had outgained the Seahawks 32488 in the first half, but did little with the ball after halftime.Still, Houston was in position to win after an interception by cornerback Johnathan Joseph, but Matt Schaub was picked off by