JC, I had a similar experience buh it was on a Greyhound bus that had just left Laredo, TX for San Antonio and points north ... a busload of passengers OBVIOUSLY from south of the border ... border patrol coming through the bus asking passengers one by one ... "US citizen, si o no?" ... not one mf saying anything but "yes" or "si, papa" ... wuss yet, they apparently gehhin through on dey personal recognizance cause iz no documentary proof being provided ... jes de affirmative answer and dahiz dat, border p moving to de next passenger and automatically everyone is a citizen.
I was in the backseat nearest de toilet, groggy from ah uncomfortable sleep, only gehhin up because the bus had stopped moving ... Border P, approach me on a completely different level the instant he make me out in the back .... even hurriedly skips pass a few amigos to reach me ... I watching him bewildered. Ah mean, on de serious? Of EVERYBODY on de bus, iz me likely to be illegal? wdmc. Ah hand him mih passport etc. and give him a version of my stock response when dealing with law enforcement types ... to this day, I still find the irony of de situation funny ah way ... porous borders indeed.