Allison P. DavisMar 29, 2011 12:00 PMMost Dangerous Object in the Office: Superior Hiwheel BicycleNobody said going retro would be safe. Proof: Rideable Bicycle Replicas' 4-foot-high bike, which we've been careering around the office hallways.Photo: Daniel SaloSave this storySaveSave this storySave