Batman notices a water pipe running along the wall and quickly moves to bust it open. But alas, Catwoman has filled it with catatonic which knocks the Dynamic Duo cold.
When they awake, they find themselves tied to giant BBQ pits lined with reflective material which has been greased with margarine. Giant magnifying glasses are positioned over the heroes so the full heat of the sun is bearing down on them. Catwoman plans to cook Gotham's protectors!
He has calculated the asimythal equal distant projection of the sun's rays and has determined if they use their feet to move the magnifying glasses 14 degrees to the left, the sun beams will be concentrated on their bonds. Batman warns Robin that precision is of the utmost importance because one degree too much or too less and the sun will fry their hand.
They move the magnifying glasses and as the solar eclipse comes to an end, it appears as if Batman's calculus was indeed correct.