Is it possible for a guy to weigh his own penis?

my friend said that he just laid it on a scale and weighed his and it was like 2 and a half pounds. But I tried and there's no way that I would be able to lay my manhood on it, I mean I can like move up against it but there's no way to just rest it on the scale right? Is there a way to hold it further from your body so you can weigh it?