Two men told police they were experimenting with making explosives after watching a how-to on YouTube when their attempt exploded on a Bayonne fire escape yesterday afternoon, WPIX reported last night. Christopher Ziobro, 21, and Ghaias Mirza, 18, were being questioned in the 33rd Street incident in which no one was injured, the television report said. A man who lives in the apartment directly below told the station there were two loud blasts and milk containers were involved. WPIX Video at link