Our friends at Jalopnik just published a new set of spy shots taken by one of their readers at a California gas station. Not so special considering the number of spy shots we have seen already, if it were not for a few important details: the Porsche 991 mule made no sound when it pulled away and the side vent shown in the picture was just a sticker which suggest Porsche likes to make it look like a Turbo mule. It raises the question if this is the first clear sign we can expect a Porsche 911 Hybrid in the line-up of the next generation 911.