On Halloween night you need to do the following whether you are trick or treating yourself or just answering the door:

1)disconnect the hose from the receptor that holds the water.
2) put the breathing mask on
3) wrap the disconnected hose around your neck with about a foot of the hose falling loose around your navel.
4) put on a Lone Ranger eye mask over your eyes.
5) put on a white hat
6)Now the most important part of the costume-get a battery operated leaf blower !

When the door opens you know what to do.

Be aware though-some parents may become a little upset.

And yes, I have done this more than once-the most successful being knocking on the door where a group of girl scouts were celebrating Halloween