The act of taking copious amounts of uppers and downers in alternating succession, so as to achieve a psychological seesaw affect
“What’s up with Kieth? He’s turned into an introvert, then extrovert, then back again like 4 times in the past hour..”
“Oh don’t mind him. He’s just been taking a solo ride on the substance seesaw since he clocked out at 5. You might wanna hide the rest of the booze while he’s atop mount Adderall.”