Last week, Francois Gissy strapped rockets to a bicycle and reached 207 MPH (333 km/h) in under five seconds. What did you do last week?
In 1965, the city of Amsterdam started the White Bicycle Plan that provided free public bicycles for anyone to go from place to place. Within a month, most of the bikes were stolen or found in canals.
The 1815 eruption of Mount Tambora lead to an unseasonably cool summer in 1816, which lead to an 800% rise in oat prices, which lead a German inventor to create the predecessor to what we now call a bicycle.