For some ESL (English as a second language) learners the two vocabs of the headline might mean difficulites and mix-up potential especially pronounciationwise.

Buzz is an onomatopoetic expression, i.e. its sound insinuates its meaning: the two z´s at the end, pronounced correctly vocalized, sound almost like the noise a fly makes, which is exactly what it is.

Additionally, it can also refer to that intermediate state between sobriety and alcoholic intoxication.

A bus is a means of public transportation used by people either because of environmental correctness or lack of money.