This are the ametralladoras, string of fire crackers, that inundate the air with its sound and smell at midnight on Christmas eve and New Year's eve. This particular one is 10 meters long.
Ametralladoras come in 20 cm pack all the way to even 50 meters. I saw a 50 meter one go off for the 50th birthday celebration of a friend's dad about 16 years ago.
'Quemar cuetes' is a fairly common tradition on birthdays. Early in the morning you are waken up by the sound of a half a meter long ametralladora and the mañanitas.
HAPPY BIRTHDAY ALEX A 20 MT LONG AMETRALLADORA FOR YOU!