While watching the latest episode of barbecue pit masters I noticed what looked to me like an onion in a firebox. This is at the beginning of the show where each team shows and talks about the type of cooker and wood they're using. I paused the screen and took a picture of the firebox with my iPhone. I hope you can tell from this picture, but tell me what you think. Does this look like an onion to you and has anyone else done this and why?