Here are some pictures of damage from the 6.8 magnitude Nisqually quake in 2001. Some of them show the debris, and at least one of the triggered mud slides from the quake. If Seattle gets hit with the big one, a person probably would want some sort of safety boot to get out of the downtown debris field.

http://seattletimes.nwsource.com/photogallery/quake/photo18.html