The Weight of my Guillotine

isolated system

I don't know how fast i would fall if i jumped from this building i built with my own two hands
I don't know when i should hit the ground
But I’m guessing soon
There are equations to show me how I fall in relation gravity and how high I am
But I don't know how many bricks i lay on top of one another

This is not at isolated system

The weight i carry pulls me down like gravity
And my stubborn determination drags the earth toward me
But the air we hold between our lungs when we kiss acts as air resistance and holds me up
I spread my arms and my surface area and i pretend im flying
And hopefully your arms will catch me before i hit the ground