Today I learned that the a V-2 rocket was much faster than the speed of sound, in fact the max speed was more around Mach-4 (5,760 km/h to be more precise, according to wikipedia), and flied using a water-ethanol compund and liquid oxygen (!).

Some survivors were in fact reporting the hitting of the blast in utter silence followed by the sonic boom and the sound of hell breaking loose.

Here’s a goody: the mapping of all the V-2 landings in London: http://londonist.com/2009/01/london_v2_rocket_sitesmapped.php