"I do my best to look the same in every picture..."
There once was a student named Schwyn
Who constructed a box out of tin(*)
That had the propensity
Of locking the intensity(**)
Of an input to be plugged therein
Then one day - let me give you the scoop
Deep was worried about our Feshbach loop
He said: "I'd give my pre-molars
for some PID controllers!"
And that was how Ben joined the group
(*) actually, aluminum
(**) well, not intensity in the physical sense... Voltage, to be precise.
Ben on the verge of using his scary, arcane powers of science.