Monday, I went for a deadlift PR (nothing earth-shattering; 315# @ 155BW, it was my very first 2xBW DL, though, so I'm pleased but not satisfied). Got the bar up, locked out, put it down, and then, for lack of any better way of describing it, it felt like just about every muscle from my eyebrows to my ankles sparkled/fizzed.
Did a second rep after about a 30 second break, and didn't have that weird after-effect.
What the fuck WAS that? CNS overload? GPC going into overdrive? I have no idea.
I'm hoping someone here can shed some light on it, because, while I'm not freaked out, I'm confused and curious.