SELECT COUNT(*) AS implausibly_long_totalLength
 FROM log.ReadingDepth_16325045 AS a
 JOIN log.ReadingDepth_16325045 AS b
 ON a.event_pageToken = b.event_pageToken
 WHERE a.event_action = 'pageLoaded'
 AND b.event_action= 'pageUnloaded'
 AND (b.timestamp - a.timestamp) < (b.event_totalLength + 2);