Commentary: I Almost Died This Weekend (Don't Let Anyone Convince You Otherwise!); So...

Three lessons:

1. As a family friend pointed out, I need to gradually withdraw from caffeine days before the surgery next time.
2. "I will not die; but I will live to tell what Yehovah has done": Interpretation Two happened. i.e., I had severe complications, though I did indeed live. (The other three interpretations: live without complications; die physically and at least be in Heaven, and live at the Resurrection; and die physically and at least be in Heaven, and live at the Resurrection as well as perhaps so-to-speak live through whatever writings of mine, etc. others discover after I die.).
3. There are people whom will take the low-enough action of unfollowing a person on Twitter just because he or she hasn't tweeted in a day, even despite that he or she made clear that he or she was having a surgery! Of course, I have to wonder how those people treat their loved ones and others will illnesses both online and offline!

Meanwhile, here's the long story short regarding how I almost died (and relearned to never assume that any surgery, including a Baclofen Pump-replacement surgery, will be successful without complications as well as to never take life for granted):

After coming out of anesthesia successfully, I gradually had an onset of severe caffeine withdrawal. The withdrawal, from what I understand and experienced myself, totaled 10 hours (I thought that it was way less before I was told otherwise! Anyway, I had 10 hours) of life-threatening headaches, vomiting (including throwing up coffee), and near-fainting dizziness due to a caffeine headache that was resolved by a caffeine IV (and then I held down coffee!) and caffeine pills (Irony!). 

I was held back for almost two days, having not come home (away from home) until Sunday (and I was scheduled to come home on Saturday morning, and was anticipated to come home perhaps even on Friday afternoon!). As for the present, at least I'm home (away from home [L'shanah haba'ah b'Yerushalayim, 'im yirtzeh Yehovah!]) and recovering step by step.

I'm also learning and relearning to never take life or uncomplicated success in surgery or recovery for granted, and I'm advising others to learn and relearn from someone whom almost died (namely, me) to never take life or uncomplicated success in surgery or recovery for granted!