Well, it took place after my grandfather (a fourth degree knight) passed away.
The jist of it was pretty much a roll call of all the members in that particular chapter. One man in a robe would read off the names of the members, and other on the other side of the room would yell "PRESENT!" Then the reader got to about six names who turned out to have died recently. The reader called a name, there was a long pause, the name was read again, louder and angrier, and the second man responded in a regretful tone "absent." Then a man in a black hood and robe with a skull and crossbones came marching out and extinguished a candle. This was repeated until all the names were read.
I guess I don't even know what I'm looking for here other than to share a totally messed up memory from an 8 year old.
I actually witnessed one of these as well...about 3 years ago. They had candles lit for all the members of the congregation, and the put them out as the deceased members names were read. If I recall correctly, it was a yearly thing.