My wife left our car (Model 3) with her phone for a short visit to kiosk and she did not remember that it would cause locking of the doors of the car and also activation of the Sentry mode. Our daughter with her four months old baby were waiting inside the car since they were soon continuing the trip. Without any warning message there started heavy metal music playback with full volume in the car (100 - 110 db) and that was naturally a big shock for our daughter and her small baby! It took about one minute before she managed to get out from the car with her baby sitting in her safety seat and that time period caused a big risk for the hearing of the small baby! Suggestion is that there should be 1st warning message that the Sentry mode alarm has been activated and playback of the music would start only after that warning message and also in the beginning with lover volume and rise to full volume gradually. This change would not heavily weaken the original purpose of the Sentry mode alarm but would provide clear safety for the unfortunate case we had that could easily happen also to other people before they get used to the Sentry mode.