Torres almost died of asphyxiation when he swallowed his tongue. Thankfully, Gabi pulled it back out almost immediately.
Additionally, football is so intense in Spain that these kinds of chants are common. You should see the insults they hurl at Messi and Ronaldo, it's quite ridiculous at times. You won't see such intensity in England nowadays because of the daylight robbery that they call "stadium tickets".
At the same time, Spanish fans will cheer their heroes. Don't worry, there are some scumbags who chant things like that during the games. But in the case something unfortunate happened to a national hero like Torres, they would celebrate him. (Except for the Barcelona region, likely.)
Don't forget that Iniesta received a full standing ovation in the Santiago Bernabeu (Real Madrid's stadium) and the Cornella El-Prat (Espanyol's stadium) - FC Barcelona's two biggest rivals. This is no matter of joke. I haven't seen such an ovation anywhere else. Torres would have received a similar response if anything had happened to him.
Title says it all.
They were chanting "Si se muere, qué se le va a hacer" which means Even if he dies, what will we do with him?
Thankfully Deportivo players asked them to stop and they gave a few claps before Torres left for the Hospital.