Ok so guys, it's as a good time as any to educate people.
If I remember correctly (i don't feel like rewatching that again), Kjaer tried to touch Eriksen's tongue while he was on the side. If he did, it's NOT what you should do.
1) People on the side won't "swallow" their tongue
2) When you start CPR, you just tilt the other person's head back and that's usually enough to clear their airways (unless they have something in the mouth or have something obstructing).
Trying to grab the tongue, pull it or do god knows what is totally useless but it's a very common myth among athletes.