Why does water stop coming out?

No.14203442 ViewReplyOriginalReport
I put the straw into the water with my finger on top.
I remove my finger, the air is pushed out from the water pressure and the air and the water shoots out on top. But then it stops.
The pressure below is still the same which is what did this i presume. So why does it stop?

Also interested in how to calculate how high it will shoot based on depth i push it in...