weighed maybe 10 lbs more than me, by doing a quick take-down in front of his roommates. Very awkward for all of us. (He'd said something along the lines of no girl could take down a full-grown boy, so I grabbed his arm and pulled forward while putting my leg behind his and forcing him down onto his back on the carpet. Then I felt bad and told him I was sorry and asked him if he was okay, and he glared at me while standing up on his own power.)

My oldest son has grown nearly a foot in the past 15 months, and now weighs about 45 pounds more than me. He's had to learn to be really gentle because it's too easy for him to accidentally hurt me (it used to be he could give me a little friendly punch on the shoulder; but to do that now would leave a bruise). He doesn't lift weights or anything, it's just that his mass is so much greater than mine.