Home remedy for heartburn/acid reflux

So last night, I had the worst heartburn of my life.  I had only eaten bland food, but my chest was still on fire!  I used a remedy that my brother-in-law told me about after I saw him perform this strange task at what seemed to be out of the blue.  All you have to do is eat a teaspoon of plain yellow mustard.  That's it!  I didn't think it would actually work, and I hate mustard, so I really didn't want to try it.  After aching so bad I couldn't stand it, I pouted about how bad mustard tastes, but then I swallowed that teaspoon of mustard and......gone!  After a few seconds, I was no longer suffering.  Who knew?!