Spell Accidentally Makes Me Giant

I'm trying to impress one of my coworkers who I learned is into big chested women. I found a spell book from a friend that is supposed to do body mods. I flick through the book, eventually finding the spell that will suit my needs. I begin to read it and then laugh as I decide that it probably won't work and I'm being silly for even trying.

Almost immediately after shrugging it off, I feel the effects as my shirt tightens and I moan with the growth as my breasts begin to expand and fill my shirt! I admire my new body and I can't wait to show off my new big tits to my coworker!! However it's not long before the same feeling comes over me again. I try to talk myself out of it... my breasts were only supposed to expand once. My face clenches as my skin stretches and my breasts expand again. My skirt gets tighter around my waist too and I realise that this time it's not just my breasts that got bigger!! I panic a little... reading through the book once more. Is there a counter spell to make it stop?? Before I can find anything... I start to grow taller. My clothes are so tight now that they begin to hurt so I pull them off me. It won't stop!!! My entire body gets bigger and bigger.... I'm growing GIANT!

Soon my hands touch the ceiling as I try not to bump my head on the roof. My coworker comes in to find me towering over him. He looks so small underneath me now. I try to stifle my panic as he flips through the book to try to find a reversal spell but it's too late. I begin to grow once more... shouting at him to move out of the way as I drop to my knees. I'm getting so big that I'm filling up the entire room. I tell him to move but it's too late, there's no where to go!! I can't stop myself from getting even bigger and the screen goes dark.