Kelsier  threw  himself  upward,  Pulling  his  way  to  the  roof  of  the  building.  Gemmel kept going up past the roof, flying toward the tips of the four spires that adorned the front of the building. Kelsier dropped his entire bag of coins — the more metal you Pushed off, the faster and higher you could go — and flared his steel. He Pushed with everything he had, sending himself upward like an arrow. Mists streamed around him. The colorful lights of the stained glass windows withdrew below. A spire dwindled on either side of him, growing more and more narrow.  He  shoved  off  the  tin  cladding  on  one  of  them  to  nudge  himself  to  the  right. With a final Push of strength he crested the very tip of the spire, which had a knob on top the size of man’s head.