(Tigard, OR)  --  A man armed with a knife was arrested in Tigard after crashing into six cars and sending two people to a hospital.  The incident happened on Wednesday.  Forty-three-year-old David Rudge is accused of hitting five vehicles on Pacific Highway with his pickup and then crashing into a car at Southwest 78th Avenue.  He got out of his truck armed with a knife.  An off-duty Lake Oswego Police officer helped bystanders hold Rudge down until Tigard officers arrived to arrest him.  Investigators learned earlier in the day Rudge eluded Lake Oswego Police.  He faces vehicular assault and other charges.