
To be thrown is not a question of time, i repeat.
When you're thrown as a dasein, you have the choice to fall or not. Afterwards...
At that point, Time becomes significant.
The inauthentic present is a 'making present' which finds its expression in the turblance of Dasein's Falling - the expression "What should I do now?" and then after that" etc. gives the sense of this present: it is Dasein's constantly leaping after new possibilities.
Or you can choose to stay in the authentic present, just like a little child.