I was a passenger in my infiniti qx80 going about 25 +/- . there were 3 beeps and the car suddenly breaked on its own in the middle of the street. i looked up to find nothing in front of us. the driver said the car breaked suddenly on its own! her foot was on the gas peddle and when she reacted by going for the break it was already to the floor. there was absolutely no reason for this emergency collision feature to go off. luckily there was no one close enough behind us to rearend us, although i'm certain the driver wondered why we slammed on our breaks in the middle of the street. thankfully we had already got off of i80 where our speeds ranged up to 70 mph. the dealership currently has the car and claims they can not find any issues, i'm fearful of getting behind the wheel and taking any chances of it happening again. the general manager asked if it were raining hard when the incident occurred.....this makes me even less confident in this safety feature. the other suggestion was an object in the road. if the feb is et off by rain or a small object in the road that is not visible to the eye, that is not a safety feature,