i have that same problem when i use them. ill have a nice bed of coals and thow some wood on and wala, big fire. i started using a spray bottle with water to help control too big of flame ups. sometimes it does not last long, but after a few times you learn to control it fairly well. it has seemed to work for me anyway. i dont ususally open the door, i will use my flow holes.
i had to do this a lot on my chargrill smoker.
the only down fall is sometimes it stirs up some ash and it can flow into your smoking chamber. that does not bother me but it may some.
if i have neglected to watch it for longer then i should and its really spiking i have used a lot of water and it evaporates fairly quickly when the temp is up there.
i dont know, its my method and it works for me.