As a (professionally-trained) volunteer fire-fighter, I would have to agree with you. Having seen several combines burn in the past (including a Deere) I find it highly suspicious that there are no flames or excessive smoke billowing from the grid which covers the rotary screen; - the entire "flame-sweep" appears to be towards the very back of the machine. I could point-out some other inconsistencies, but this pic appears to have been edited! Not to say that plenty of these combines have burnt, though!