Steely Dan - Gaslighting Abbie

I was working on getting my upstream O2 sensors out of my LR2 and went inside to get an a swivel to reach the plug and when I came out it was loose and I would have sworn it was tight and hadn't been able to crack it. I know this because I had taken it out completely and put it back in plenty tight in fact tighter than it was in there in the first place. My thoughts were god I've got to get better sleep. Now here I am again at 2:30 am awake. Woke up with an abrupt cough and stomach ache that I soon remedied with some Alka Seltzer but now that was fairly strange.