I agree, lube up his digestive track. Whatever you do, DO NOT PULL IT OUT. It may me tangled inside him, it will eventually work it's way out.
Hi and Welcome! First of all he is going to be OK. I am headed out the door so I will answer real quick and write more later. My cat ate a bag a few years ago. Don't pull it out. It will work itself out. You need to give him some vasoline-put some on his nose for him to lick off-you need to lube up his digestive tract so that he can vomit (I Know eww) or pass it in his stool. If you have any hairball gel that will also work. Feed him some wet food-that will help lube up his tract so that he can pass the grass. Get rid of all the Easter grass in the house!!! Its very toxic and dangerous to kitties. Monitor him to make sure he is pooping and you will see the grass in it and the same if he vomits. If he stops eating or pooping call the vet immed. My kitty ended up with a partial blockage but luckily we got him to pass it by lubing up his tract. He still till this day pukes up blue Easter grass! Ill check in later and fill you in some more. :)