That's what they call the train used by migrants traveling to the US.
Customs and Border Patrol officials are taking special actions to keep would-be migrants from getting on it amid an influx of undocumented immigrant children crossing into the US.
The roar of a train, mixed with the melody of the Marimba.
A musical combination creating a song called La Bestia, translation: The beast..
Also called the train of death, which immigrants take from Central America risking robbery or murder to get to the united states border..
La Bestia is on radio station rotation in countries such as Honduras , El Salvador and Guatemala.
Eddie Ganz did the vocals. "I appreciate the song."
Carlo Nicolau composed the music. "This is a very important message. It is very dangerous to cross the border."
Neither the composer, nor the singer created the message. US Customs and Border Protection did.
Though La Bestia has no disclaimer saying who's behind it. Border protection saying they wanted it "unbranded".
It's actually part of a US Government campaign to deter dangerous border crossing.
"Good friend of mine called me and said Eddie big propaganda.. and I said ..but there're a great message behind it."
"I don't think it's propaganda. What we're doing here is sending a humanitarian message."
Border protection worked with an advertising agency to create the lyrics.
And its not the first time.
Back in 2004, CBP launched a campaign in Mexico called No Mas Cruces, no more crossings or crosses.
Several songs were released with the same theme as La Bestia.
Border protection credits the songs with helping to reduce crossing deaths from 492 in 2005 to 390 in 2008.
"They think its a pop song and they're getting into the lyrics of it and it's sinking in. What's wrong with that?"
"What's wrong? Some immigration groups say are desperate to escape violence at home and what is not needed is propaganda disguised as pop music. They say what is needed is more transparency and a better immigration policy."
"I think it's absolutely misleading when a song that has been produced by the u.S. Government, if they don't actually spell out that they are the ones responsible for it."
"We knew there are some risks involved but at the same time we wanted the message to be heard, we wanted the message to be effective."
It's music with a message. One still not powerful enough to stop many from coming.
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