Before there were halfpipes and X Games, there was Michael Lund, a tanned, long-shanked freestyle skier who dazzled the public in the 1970s with his aerial acrobatics. In April 78, however, Lund vanished after he was implicated in a $75 million pot-smuggling bust in Seattle. While his children grew up believing their father had been killed by drug dealers, Lund assumed a new identity, Steven McCain, and started a new family. That secret life was exposed last month, when his ex-wife from his second life alleged he had not paid $32,803 in child support. McCain, 65, was thrown in a Colorado jail, where a fingerprint check identified him as Lund. If convicted on the drug charge, he faces up to 20 years in prison.