 Other sections that stood out for Foster were Mutianyu because it was like riding a roller coaster; Pankou, which Chairman Mao had flooded and the only way across was by row boat; and Simatai, which was so steep and narrow that one could only pass through it by crawling on their hands and knees.On June 29, 1990, Foster finished his tour at Shanhaiguan, where he was met by a hoard of tourists, media, hosts, and sponsors.He was also met by guards, who detained Foster and his crew for an hour of interrogation.