When Dave’s really little, like, in the first few weeks after Bro rescued him from the crater, Dave doesn’t move. When Bro puts him down, he just stays there. Anyway Bro gets really worried about him because Dave won’t roll over or anything and all the babies he’s seen on tv are active or will at least roll over every now and then and wave their arms and shit. Bro kind of stops eating for a couple of days and does a few jobs that leave him feeling bone-deep dirty but it’s worth it because he can finally take Dave to a doctor. The doctor rolls Dave over onto his stomach, but Dave doesn’t move his head to breathe he just starts to cry. The doctor laughs a little and tells Bro not to worry, Dave’s just got really bad muscle tone, there’s nothing wrong with him that can’t be fixed with a little exercise. Bro is just so fucking glad that there’s nothing wrong with Dave, he’s a little surprised at how relieved he is, he’s only had the kid for like two weeks and all the kid has done is cry and shit and refuse to sleep, so why is Bro feeling so thankful that the kid is alright? Anyway, on the way home Bro buys a gym ball from Wall Mart for Dave’s exercises (and gets a few strange looks because he’s a too-young teenager with pointy anime shades who has a baby wearing a Hello Kitty onesie and pointy anime shades in his arms). He spends the next few weeks rolling Dave on the ball so that Dave’s muscles’ll build up to the point that he actually, you know, reaches out to stop himself from sliding off the ball. The first time Dave sits up on his own Bro is so happy almost cries and when he walks for the first time Bro is so proud and when he teaches Dave to fight, to flash step, when he sees Dave get it and do it he just gets so fucking proud of his kid.