[Evenkeal]

Barring some specific alignment of the straws that is favorable to you falling, in general you will not fall, because when your feet pushes down on the top layer of straws, it pushes down on more straws (not so much air.), which eventually pushes down on the floor. As long as the floor is supporting most of your weight, you are fine.

ps. i am not an expert ; this is not scientific in anyway