I can relate to this smiley trying not to be the center of attention but in fact being everything but this smiley guy is profoundly cute... To know whats being said you really have to save it really and semi click off the [x] as if closing your screen at each interval of speech but keep hold of the left mouse click pressing down when pointing on the cross since if you let go your browser screen or image viewer will obviously close. That is the artificial and improper way to pause a frame though, so if you have "pause or still" function use it to see the text coz it rolls by quickly.
No AUDIBLE explanation skylark since smilie speak is not audible thru my speakers silly as it may seem, I think the reason is there is no comprehenisible reason for why the smilie lay on his side, except that maybe others joined him as they all fall into line at the end as though on a conveyorbelt and then it replays.
I'll type out the script of it a bit later, though I don't think I missed any part of the animation which would offer any clue, so I guess its just a giggle. and you fill in what you imagine him to be saying I guess.