footage shows best friends carmarie and kanya sat buckled up in the device at the indy speedway park on panama city beach in florida .
at the start they appear to be pretty calm but when the carriage tilts back and fires 300ft-high panic sets in .
at one point carmarie - who appears to be older - tells kanya : ` if i die , tell my mama i love her '
to date the clip of their traumatic theme park outing has been watched more than 17 million times on facebook .