After an Earthquake, These Elephants Knew Exactly Who to Follow: MomElephants at the San Diego Zoo displayed a defensive behavior called 'bunching' in response to a 5.2 magnitude earthquake.
TTC 'bunching' to blame for widespread service delays on buses, streetcars, report suggests | CBC NewsBunching of transit vehicles in Toronto leads to significant delays, causing riders to wait 30% longer than scheduled.