Reaction game??

I don't know what i'd call it but, the concept is somewhat simple, basicly u like walk onto a bridge and when ur somwhere on the bridge a action should trigger(lige the bridge collapseing or something) and u have to hit various keys withing a short ammount of time to escape it(else u will lose a % of hp and repeat the sequance u failed until u get it right). ehm something like this : http://www.youtube.com/watch?v=YP5yeAEIj70 0.55-1.15

ps: this is my first try on unity, so im on unity free. Any idea's appriciated, like putting in a movie or being able to use funktions in unity.

(if it matters i make the models n so on in 3ds max)