all I can say to your experiment is ...

how much did the empty pen tube weigh?

and how large was the smallest portion where air could pass through it.

it doesnt look like you blew the balloon up very much at all judging from the amount of air in the bag...

try the same with a lighter straw and see what happens.
please dont use a coffee stirring straw.

and one more thing you might try using a string attached to the ceiling of your room and also attached to the tube.

and instead of expecting it to move upward against gravity just see if it will move horizontaly.

I bet it does.

3/4 inch of dust build up on the moon in 4.527 billion years,LOL and QM is fantasy science.