I get this occasionally. Apparently there is a term for it as one of my clients was describing it to me one day and it was the exact same thing I've experienced and what you're speaking about above. She'd had it for years.
Last time it occurred for me was while eating cheesy Italian shells Hamburger Helper. All of a sudden I felt like I have something the size of a tennisball of food stuck in the esophagus, just before it went into my stomach... and it feels like the esophagus is being "stretched" when it doesn't "want to" stretch. Painfull as fuck, & I also start to panic a little bit at first, then realize I can still breathe. Then, when I go to throw up, nothing comes up at first and it takes me awhile before I actually get the food to come up.
Last time it happened I was at home sitting on the couch with a girlfriend, however I've also had it happen in a fucking restaurant with sushi
