Complex sentence: As he leaves Kerry's room, he sees a red-shirt CHERUB called Andy Lagan, who after finding out James was dumped laughs at James when Kerry screams at him before throwing his boots out of her room and into James' face.
Split into simpler sentences: As he leaves Kerry's room, he sees a red-shirt CHERUB called Andy Lagan. After finding out James was dumped, Lagan laughs at James when Kerry screams at him before throwing his boots out of her room and into James' face.