Hi Abdel,
As a pilot doing a go-around is no big deal, sort of like a takeoff starting in the air, however it can be a bit disconcerting to those in back. Even the cabin crew gets a bit uncomfortable, all have a mental picture of a routine landing and just when they are expecting a touchdown, the power increases and the nose pitches up. I've had a few go-arounds in my career and when it does happens, once the aircraft is setup, we have spoken to ATC and the workload allows I make an announcent to reassure the passengers and to let them know what has just happened.
Seems the RAM crew made no effort to communicate with the passengers(customers) and have unecessarily upset them.