The Last Guardian – Lifeline Trophy Guide – Saved from falling by Trico’s tail 10 or more times. [Silver]
This can be done after Trico learns to catch you with his tail (happens automatically during the story). He will do this when you are about to fall to your death. This results in a short slow motion sequence.
A good farming spot can be found shortly after the tunnel collpases in the mines (relatively late in the game). After that you must climb out, kill some enemies and go to a bridge. After a climbing section you see a cutscene. The bridge collapses and Trico will fly to a tower. While he hangs from the tower you can farm this.
Climb on Trico’s back and look at his tail. Press X to fall down. You see a slow motion sequence and he catches you. Repeat this a total of 10 times until the trophy unlocks. It only counts when there’s a slow motion sequence during the fall. Trico will catch you automatically.
There are several other spots like this throughout the game. Sometimes Trico will hang off a cliff or bridge. The same strategy applies, just fall off his back and he will catch you.