That river in Egypt

"This is Pollice Verso, painted by Jean-Leon Gerome in 1872. I like the colours of the rugs, and the shine of his metal armour. Imagine being the guy getting stepped on. Not only do you probably die, but you get a thumbs down at the same time! It probably meant something different since I doubt people in 1872 or even ancient Rome had YouTube, but still"

https://en.wikipedia.org/wiki/Pollice_Verso_(G%C3%A9r%C3%B4me)