I was trying an experiment smoking chicken breasts in my MES 40.I dumped the hot ash into a lawn bag ,I noticed some embers when I dumped the tray I figured since it was mostly dirt ib the bag it'd be ok.Around an hr later when we were eating outside (luckily) my sister says is sonething burning in the garage.The bag was lit up like a torch I grabbed the bag drug out if the garage while my wife grabbed the hose and put the bag out.I almost told everyone to eat in the house because I was hot from standing over the grill,luckily I changed my mind.I certainly learned my lesson.