http://www.quesabesde.com/noticias/pentax-q-analisis-fotos-video,1_7779
(Google-translated English page here)
via http://forums.dpreview.com/forums/readflat.asp?forum=1036&thread=38902166
In particular, we can have a look at how the built-in flash of the Q is operated.
N.B. The video won't play at the Google-translated page. As such, you have to play it at the original page.