I'd immediately think I'm "oh god it's happening" and that I'm seconds away from exploding. Sudden, unexpected tightness when you're already at the red line doesn't leave much to the imagination.

If this is a fantasy scenario and I'm bloating without explanation, the fear of bursting would quickly be swapped with "I need to get out of sight". I've somehow managed to avoid public indecency violations up to this point, but that'll quickly change if my top rips apart. Not that I can run much anymore, but I'd try to get a private place out of sight as quickly as possible. Should the bloating stop before that happens, I'd cautiously head home and relish in all the stares. If not, I'd have to call a friend to urgently bring me a cover and take me home.

If I did go boom out in public, I hope lots of people film it! 💙