I guess il put my 2 cents in even though we have a common answer for the most part.
You dont really feel a "High" like Percs,H,XTC, etc etc. Like I took 2mg and I didnt notice it until I went into a gas station for a pack of smokes and ended up hardcore flirting with the cashier and getting a number

Anyway usually without benzo i have bad anxiety and would of never even tried flirting with her with out the benzo in my system..Understand what were all pretty much saying?
ALTHOUGH with you HUGE amount I also have a similar story for that to lol....I decided to take 10 xanax bars one new years eve...very long story short I woke up in a rehab 3 days later, But after i sobered up and talked to people I talked to those 3 days said I seemed perfectly normal i was holding conversations well, Didn't seem weird or anything like that. (I MUST SAY NEVER DRIVE UNDER THAT MUCH SUBSTANCE. I MADE A VERY MADE A VERY STUPID DECISION REGARDLESS THE OUTCOME)
Anyway drove to my own moms house and she said i was perfectly fine to.
So what im saying even in huge doses sometimes you just seem like your in a really good mood and dont even notice a "high"
One thing I DONT think anyone seem to be mentioning. Please correct me if im wrong.
Some other reasons you may of not felt anything could be simply had bunk pressed pills, OR had some super old pills.