I think
that by this stage you will be thoroughly
embarassed to have been caught out like this. It
is extremely important with rocketry, even water
rocketry, that safety comes first.
If you
have any sense, take this as a lesson and stop
doing things that you are told not to. If you are
at a learning establishment, I bet that your teacher
or lecturer hasn't clicked here and if you are
doing this as a hobby and not as part of a course
then take note of this.
Take
this opportunity to go back to the Water Rocket
Index and don't do anything you are told not to.
You
were lucky this time. Carelessness with rockets can be more dangerous.