<P> Firearms expert Julian Hatcher studied falling bullets in the 1920s and calculated that . 30 caliber rounds reach terminal velocities of 90 m / s (300 feet per second or 186 miles per hour). A bullet traveling at only 61 m / s (200 feet per second) to 100 m / s (330 feet per second) can penetrate human skin . </P> <P> In 2005, the International Action Network on Small Arms (IANSA) ran education campaigns on the dangers of celebratory gunfire in Serbia and Montenegro . In Serbia, the campaign slogan was "every bullet that is fired up, must come down ." </P> <P> Bullets often lodge in roofs, causing minor damage that requires repair in most cases . Normally, the bullet will penetrate the roof surface through to the roof deck, leaving a hole where water may run into the building and cause a leak . </P> <Ul> <Li> Philippine Health Secretary Francisco Duque III noted the drop in stray bullet injuries, in that country, during the 2005 year - end holiday period--from 33 cases to 19 . </Li> <Li> The number of complaints regarding random shooting in Dallas, Texas, on New Year's Eve declined from approximately 1,000 in 1999 to 800 each in 2001 and 2002 . </Li> <Li> In early 2008, increased partisanship in Lebanon led to the practice of firing celebratory gunfire in support when politicians appeared on local television, leading to multiple deaths and to calls from these leaders to end the practice . </Li> </Ul>

Can a falling bullet go through a roof
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