Typically the left side of an escalator dedicated to speedy individuals who don't have the
time or
patience to let the escalator take them where they need to go, therefore, they angrily
speed-
hop (sometimes taking double steps) up or down the moving staircase and pass everyone on the right side, leaving them with the following possible impressions:
"I'm more important than you; shove it"
"I'm wearing a suit and have places to be"
"Oh shit I'm late I'm late I'm late"
"I have to catch a bus, get out of my
way or I'll trip you"
You can use this method to your advantage, but if you fall on your ass and go tumbling down the moving stairs, you're on your own.