One Word Prompt 3: Gas

I thought this would be a fun one! So many things you could do with it: Did Tony run out of gas on a cross-country trip? Is there poison gas and Tony's suit filters it, but Steve's gonna die? Is there sex pollen gas? Did Steve eat too many burritos? You decide!

You can post pretty much anything you want: headcanon, drabble, story, poem, art, meta, video, joke, song, your general thoughts, whatever you were inspired to create. It is just a chance to have fun. No pressure. Open to anyone who wants to participate.