The Frog is a guy of small stature and bearing, complete with SMS (Small Man Syndrome) As is common with suffers of SMS he is into martial arts, has ILS (Imaginary Lat Syndrome) lots of tattoos, and never wears shorts.
Like most nocturnal amphibious creatures, The Frog will emerge when he feels the time is right from the sanctuary of the kick-boxing room, descend the stairs to the weights room, and proceed to “rib-bit” in a safe vantage point: in this case the cable-crossovers.
Up he leaps to the chin-bar mounted in the middle of the crossover, and locks his elbows and knees at 135degree (half way between the 90 degree bend and a 180 degree full extension). The he hangs, with his elbows and knees at 135 degrees, his hips open to such a degree that even from side profile his bent knees do not break the vertical: he looks just like a frog on the dissection table.
Now he is on the bar, looking like a frog, he twitches and convulses in some semblance of an activity which vaguely represents a chin-up. He actually manages to get about 8 inches of travel form his chin by throwing his head up: he lifts his chin from his chest into the air, sending shudders through his whole body. His elbows don’t bend, nor is there any movement around his shoulders. The only parts of his body that move are his china, his head, and his pelvis, the latter which lurches to-and-fro (nothing in the vertical plane) like a dog having (invisible) sex while being electrocuted.
Or like a frog, hanging there, being eviscerated and tortured.