You're correct and here's exactly what happened.
The Holy Roller
The Raiders were trailing the San Diego Chargers 20-14. They had the ball on the Charger 23-yard line with only 5 seconds left. Ken Stabler faded back to pass, but was caught by Woodrow Lowe before he could get rid of the ball. In desperation he intentionally fumbled it forward. The ball bounced ahead to FB Pete Banaszak at the 11-yard line. Surrounded by Chargers, Pete decided to kick the ball forward himself rather than try to cover it. It reached Dave Casper at the 5-yard line. Casper kicked it into the end zone and pounced on it, recovering the 23-yard forward fumble for the winning touchdown. The Chargers were furious but the play was legal and stood. It was quickly made illegal, though, following the season, and the rule outlawing it is often called "the Raider rule."