no idea about the conditions for the overbooking (that could have been caused by "extra ordinary" circumpstances like the big plane going tech etc. ) but to me it looks like it was not a normal overbooking. I arrived at the gate when the "unlucky passengers" queued to be marked before going to some transfer desk. To me, it seems that it was only C class passengers that certainly did not really want to arrive at 23.30 at BLL... I am usually very much volunteering but even in this case, with a meeting early today, i would have refused. (given the fact that SAS vouchers are almost impossible to use in a practical manner, i wonder how QI vouchers could be...)