If you live in Long Island, why not just do it with a shotgun? You do not need a permit to buy a shotgun if you live in long island. According to
lostallhope : Shotgun to the head is 99% lethal while jump from height is only 94% lethal. Also According to my research the main thing is aiming, I would do in my mouth and I will be careful to keep my gun steady so I do not flinch while pulling the trigger. I was reading on quora from a former paramedic, he treated a guy who attempted suicide but the shotgun was too long and he shifted the muzzle of the gun to the cheek before pulling the trigger and ended up surviving. I was thinking of combining two methods: shotgun to head while jumping from height or shotgun to mouth while falling into water so at least i would drown. IDK what im going to do for sure though, i want to make sure that I die before anyone tries to save me