1RXS J053234.9+624755 was in outburst during April 2005 when this observation was made.  I found it difficult to make an observation because the magnitude was jumping all over the place.  I had seen DNe flickering before but not to this extent - nearly one magnitude in 20 seconds.  I decided to monitor it for as long as possible so made an estimate every 10 seconds for 24 minutes.  After this time I couldn't trust my eyes as they were feeling strained so I stopped.  The data was later analysed by a professional and confirmed to be real flickering within the system and not due to atmospheric seeing. Flickering in CV's is not well understood, and is probably a disc phenomenon although a school of thought suggests the mass transfer stream.  Whatever the cause it's amazing to watch, especially at this sort of amplitude.