Dulce alondra locomotora video explained here.
However, this commemoration had a tragic event, since a woman identified as Dulce Alondra died after receiving a blow in head while looking to take a photo.
The video of the event began to spread on social networks; In this one the female is seen wearing an orange blouse and with a backpack on her back.
She takes out her phone for a selfie, but miscalculates the space between her and the locomotive, and ends up getting hit hard.