The person walking by heard a ting as Rick got out of his car and proceeded to run from his car to his house unaware of the ting that happened when he got out of his car. So the person walked up the driveway and scanned the pavement by Rick's car door. The person saw a gleam of light reflect off an object on the pavement. The person picked up the object, a ring, this person said to them self as they slid it on a finger to examine it more closely. So there in Rick's driveway with the magic body swap ring on their finger was the next door neighbor,