You hear a ring at your doorbell after your ordered your pizza but your a alien from half life xen quite odd but the scientist delivery man is scared off a xen trees just a bad day I guess that that was * if your where a xen tree he would run the heck out of there but he's unnerved by xen aliens and he is quite stupid but even if he tries to go to black mesa he would be sent back to finish the pizza order the alien from xen ordered

Scientist delivery man : Pizza hears nice delicious pizza