The LAFD uses the Stihl 046 for our ventilation/rescue saws, they are really reliable and durable. They start every time and take a lot of abuse, the video shows some of the crap they can take. They can get choked out with heavy smoke during ventilation opps. but there is no way around that.
http://www.youtube.com/watch?v=CJPt_1VAUVg
Another quick video, thats me holding the Stihl where the group of 3 guys come together, we had just cut the hole that the camera pans to at the end of the video, great saws!!
http://www.youtube.com/watch?v=annB1JRXsdI