it turns out, if i jump off the lanai like this, i'll step off like this. i'll step off like that. i'll hit at the same time in all places. over here, i'll be going faster, because i have a bigger speed like this. and that arrow is gonna be bigger than this and this. i'd be faster, but i've gone a further distance. - right. - okay. and later on we'll talk about a neat, neat concept that'll tell you that down here, the--wait a minute, i will not be going faster. erase the tape. lionel, that's wrong. it turns i'll have the same speed here, here and here. no, i won't either. no, i won't either. now, lionel, the tape's okay. leave it going. sorry. [laughter] i get a little mixed up. do you guys get mixed up with this stuff? i mean, all the time, i get mixed up with elementary physics. so if you guys get mixed up, don't feel bad. i'm with you, all right? with this clip, i'm gonna fasten the point here. now, i'm gonna crank this again, okay? if you see a lightning bolt from here to here, if you see that, scouts honor, "a" in the course. if you don't see that, then you got to do your exam