"A street sign behind Barney reveals that the bus that hit him is going the wrong way on a one-way street." The bus going the wrong direction on a one-way makes sense in this scenario considering when Barney is crossing the street, he only pays attention to the other side of the road (the only side that any cars would normally be coming from). The sign is also clearly a focus of the scene.
When Ted first gets into the cab the cab number reads 6Z28. At the 35 second mark the cab number now reads 9Z72.
During the flashback of the "Kennedy Airport: 1999" miracle, the uniforms that the Customs officers are wearing have U.S. Customs and Border Protection shoulder patches with the U.S. Department of Homeland Security Seal. U.S. Customs and Border Protection was created in March of 2003 after the establishment of the U.S. Department of Homeland Security and the reorganization of federal agencies.