Achtung
Achtung means attention in German, and is used in German announcements, signs and warnings. It is particularly familiar to English speakers from films in which they see the military usage, meaning officers calling soldiers to stand at attention. This has lead to half-joking usage of the term in informal English to get people to pay attention, and featured in the title of Irish pop group U2’s 1991 album Achtung Baby, which was recorded in Berlin