his last name, films his two young sons as they watch tv. >> i tend to get the camera out every now and then. i'll just take videos of them just doing what they do as children. >> 3 1/2-year-old harry is holding his 1-year-old brother charlie on his lap. >> charlie is just sitting on harry's lap, and for some reason harry puts his finger near his mouth. >> using no force at all charlie pretends to bite harry's finger. thinking it's funny he sticks his finger in his mouth again. >> and all of a sudden charlie decides to clamp down and bite it. >> ow. charlie, that really hurt. >> just the reaction is sort of like the pause. >> ow. >> and charlie bit me, ouch. >> ow, charlie. >> ouch, charlie. >> it's just classic. >> he bit me really, really, really, really hard. >> so his little brother is gnawing on his finger, and harry never makes a move to make him