There are two kinds of Self Service Bakeries:
The one with the plastic gloves
The one with the tongs
Both of them require you to collect your pastries on some kind of tablet, balance them over to the cash register and then balance them further on to a packing station.
While the first one is somewhat bearable since it only feels like beeing a heart surgeon preparing for surgery the second one does make you feel stupid. It is like the tongs are designed to be just somewhat too narrow to be usefull for picking up biscuits.