A very good visual illustration of a re-entry of space junk. In that particular case, it occurred in time for Christmas 2011 above the European skies, by the end of the afternoon (16:25 +/- 1 minute GMT). The timing and the sky clarity explain the various good quality videos that surfaced.

This space re-entry was created by the decay of the Soyuz rocket r/b (third) stage, from the very same rocket that brought the Dutch Astronaut Andre Kuipers to the International Space Stationon the 21st of December.(http://www.esa.int/esaCP/SEMWT8BX9WG_index_0.html)

Herebelow an illustration of the Soyuz launcher (2004, credits ESA and G. De Chiara – Mars Center.
(http://www.esa.int/esaMI/Delta_Mission/SEM8XK57ESD_1.html#subhead2)

Credits: G. De Chiara – Mars Center