A Doomed Pilgrim in the Ruins of the Future

The smaller spiders keep away from the portal but the giant spider surges forward and slams two feet in front of you, cutting off the way.

Seeing a desperate chance, I leap toward the creature and give it a mighty shove, attempting to knock it into the portal. Do I succeed in moving it? If so, and it hits the portal, what happens?
Truegreen should answer.

(No worries, Truegreen. 'Oh wouldn't it be cool if...' is a most respectable instinct and I encourage you to follow it! Coming up with cool stuff that might happen is a key part of this game.
The rules limit the things you can say in the same way that the rules of a card game might limit which cards you can play from your hand - the point isn't to stop you from laying cards down on the table, but to add significance to the decision of which card you choose.)