I think that the rocket will get so much pressure in it that the rocket will get released into the air and go sky high.I think that because it's the water is trying to go up but it's going down so the water gets forced down to make the rocket go up.
Do you know what a aqua pod is? Well i'm here to explain to you what a aqua pod is, a aqua pod is a orange looking launchpad, it has a attachment point for the bottle and a valve for the pump. The pump is to add air pressure into the bottle. The bottle would be filled with a third of water. The water is like the rocket fuel.
First we had to attach the pump and pump air into the bottle eight times, Next we had to stand on the wall of room one and room eleven. Then we counted down from ten. Now we were saying ten nine eight seven, Finally Mrs Harrison pulled the trigger and the rocket went flying. Now we ran to the rocket and took it back to class, hope I have shared some information with you.