I smoked salvia when I was drunk and it was the most intense experience of my life. It was about the 4th time I tripped off of it so I thought I was ready, nope, being drunk made it like waking up from the Matrix or something, all of reality lifted up away from me, stuck to the bottom of a universe-sized elephants foot, I looked around to see elephant legs standing like pillars endlessly in the blank whiteness of the behind reality, each standing atop another universe, and I realized that the elephant foot that had moved and allowed me to see all this had probably made a mistake. Then I began to feel myself being hit\pushed by the universe because I was no longer in the correct space I was supposed to be, kind of like in a picture book how you flip the pages to make it move, I was not where the drawing of myself was but in a 4 dimensional instead of 2 dimensional since, so after I got pushed all the the way to the end of the behind-universe/reality 4d reel I jumped off to end up in a small corner stair case atop a cliff of white and I looked around at the pure whiteness that was everything and then my trip started fading.
But yeah, I can imagine very large things now, in that trip I saw the ENTIRE universe (well to the maximum extent your mind can imagine it) go up from me, it was like waking up from the matrix, glad my friends were there to keep me from freaking out