The envy of many a surgeon, I always succeed. I use neither scalpel, nor stitch, but am often the greatest of needs. Not your dollar, nor cent, as many believe, And you might say I depart first class…whenever I leave. In urgency, you often refer to my height. I am the abundance of many a prisoner, their focus and activity each day and night. I admit to being impatient, if you know what I mean, And perhaps never will I ever be subject to your elusive machine.