2) Golden Goal rule
The Euros have been a sort of testing ground for the infamous Golden Goal introduced by FIFA.
The Golden Goal was introduced in 1993 as a means to promote attacking play after negative football reached its nadir in 1992. The Golden Goal would enable a team to automatically win the fixture immediately after scoring in extra time. Euro 1996 was the first major tournament to feature the Golden Goal.
In 2000, a David Trezeguet Golden Goal won the Euros for France as they became the first holders of both the World Cup and Euros simultaneously since West Germany in 1974. Seeing that it promoted defensive play rather than the intended attacking for which it was introduced, it was scraped off after the 2002 World Cup.