Typically invoked by governmental officials during sworn testimony to the U.S. Congress to deny potentially damaging -- politically and/or criminally -- behavior.
From the 1994 film "Clear and Present Danger" starring Harrison Ford:
Jack Ryan: Who authorized this?
Robert Ritter: I'm sure they'll ask you that.
Jack Ryan: Who authorized it?
Robert Ritter: I have no recollection, Senator
Restroom toilet pisser porcelain thrown crapper shitter break powder room bathroom stall] publicbathroom dropping a deuce pissing shitting alone time
I will be back. I'm going to the reflection and tranquility room. "Why do you call the bathroom that"...reflection is what I achieve from the mirror, deep into my soul after the tranquility I've experienced from a full emptying of my guts".
Hey, I left you some lines in the reflection and tranquility room-: bruh you're the best!
Sober reflection is the act of taking a great deal of time to analyze and think through something (your life) to either reaccount how far you've come, or to assist make a serious (life changing) decision.
John: Will You have a party on your birthday?
Me: Not this year, I'll stay indoors alone and have a sober reflection cos am not growing any younger.