Your mommas so fat that in order to weigh her, they have to put her in an
ambulance, bring her to a truck weigh station, then weigh the ambulance with your momma in it, and then subtract the gross vehicle weight of the ambulance and subtract it from the difference and thats how they get her weight....

Or they can bring her to the zoo and weigh your momma on one of those scales that they weigh polar bears and elephants on, and they can get her weight that way...