This one isn't sarcastic:
I want to apologize for the times my social anxiety has snapped before I've managed to notice. When I notice, I get up and walk away. Sometimes it occurs too quick and hard for me to realize before I've opened my (proverbial) mouth and put my foot in it.
I do try to come back and talk it out once I can breath again, but it can be difficult depending on the particular personality clash. So for those who have gotten hit by the sudden panic button, I am sorry. The meds and therapy have helped immensely and the early warning system is greatly improved nowadays. I've seen improvement and I hope you have, too, but for those blindsided in the past, I do apologize.