hal watched as he lifted both the barrel and the ralston-purina box balanced atop it : he watched the monkey disappear into the bed of thc truck ; he watched as the rag-man climbed back into the cab , blew his nose mightily into the paim of his hand , wiped his hand with a huge red handkerchief , and started the truck 's engine with a roar and a blast of oily blue smoke : he watched the truck draw away .