Man climbs down 15 stories. What could be the reason?

He could be doing it for a bet. Perhaps he wagered with his friends that he could climb that many stories.

It could be a dare or a part of some extreme fitness challenge he set for himself. Some people like to push their physical limits in unique ways, and climbing 15 stories is no easy feat. It might be his way of proving his strength and endurance to himself or others.

Maybe he is trying to get a better view of Paris from a higher place.

It could be that he is in an emergency situation. For example, there was a fire in the building and the stairs were blocked, so he had no choice but to climb the outside of the building. And he might have some basic climbing knowledge and enough courage to attempt this dangerous climb of 15 stories.

If he was climbing for a legitimate reason, like a rescue operation or if he had prior permission from the building owner, then it could be legal. But just randomly climbing 15 stories of a building in Philadelphia without any authorization is likely against the law.

Maybe he was in a state of extreme despair, such as having financial problems or relationship issues.

An adventurous person might do it. They love to take risks and seek challenges, and climbing 15 stories is definitely a huge challenge.

He might be sweaty and a bit out of breath from the climb.

It depends on his fitness level. If he is very fit, it might take him around 10 - 15 minutes.

He might have used the external structures of the building, like window ledges and drainpipes, to pull himself up.