i felt a slight feeling of pity because here they would lose me again . it was a dangerous idea , but it had to be . he gave me a squeeze , his eyes went narrow and then , obviously because this was important , for good measure , he gave me a shake . chapter 20 then , the morning silence was broken with the grinding clatter of the large yellow bulldozer as its diesel engine started up and signaled the beginning of the challenge . it was wrong for seth and me to conceal the truth . 