I remember as an exchange student crossing the boarder near detroit about 5 years ago. The offical barked into the open car window at my friend and accused him of "having an attitiude" despite my friend never actually opening his mouth!!
I could do nothing but hysterically laugh at this point which seemed to put the official on the wrong foot, and we were waived through...
Yank border officals = bunch of animals who only know how to obey rules!