You are trying to teach your brother how to have a proper nerf gun battle with people. He doesn't understand why what he was doing was; 'improper', but what he does understand is he can easily trick you all the time. So he does what he does best. Tricks you into a joke bombarding, which, unfortunately for you, he noticed you were very giggly today.

"Come back here!"

Tosh called out for you, now chasing after you in a hurry. For a twelve year old, you were pretty fast..