Bull Semen Shuts Tennessee Highway Steaming canisters alarm motorists By Rob Quinn, Newser Staff Suggested by timwetzel Posted Aug 25, 2011 11:15 AM CDT 17 comments Comments A steaming canister of bull semen sits next Interstate 65 near downtown Nashville. (YouTube) (Newser) – A load of bull semen packed in liquid nitrogen caused a scare and closed a highway near Nashville on Tuesday after it fell out of a Greyhound bus. Motorists called emergency services after seeing the large, steaming canisters and smelling a foul odor, reports WKRN. The highway was reopened after hazmat teams determined that the canisters were safe and the bus driver returned for his lost cargo, valued at as much as $80,000. Arguably the best part of the story: the revelation that, according to a rep for the company, it's not unusual for Greyhound to haul bull sperm around the country. But never fear, traveler: Such cargo is kept separate from passenger luggage.