These are great days we're living, bros
I'd imagine the driver has the consistency of toothpaste now
Alain Rittemer, chief of emergency services in the Canton of Valais, said it took a full two hours to work their way through the "apocalypse" of mangled wreckage on Tuesday night.
"The first thing we heard on arriving at the scene was the screams of the children. It's almost impossible to describe," said Mr Rittemer.
"Hearing the screams put rescuers in a state of shock. All are experienced, but you cannot imagine what it was like."
He spoke as grieving families of the victims visited the site of the crash on Thursday.