and if your 14, not being funny, don't do it solo.
first time you do a bong, you WILL get MASHED.
For example....
First time you drink, it affects you more.
First time you smoke, your chest hurts, you cough and your eyes water, and you feel really lightheaded.
First time you smoke weed, you feel dizzy, chances are if it's good stuff, and you do the setup I told you, you wont remember anything, plus if you do, it will be a daze, if your grounded, your mum WILL smell it, it has a very distinctive smell, plus you won't make much sense, and you'll be laughing your ass off, or be unbelievably afraid you'll be caught.

Plus as its plastic, and you don't put it out, it COULD THEORETICALLY light the plastic pen, which will release toxins, that will stink, plus the plastic will fall to your carpet, set it on fire, then bam.

I know it's over the top, but in all honesty, don't do it solo for the first few times.