The context of the following conversation is Lee was about to dive off a pier when Sydney saw it was shallow. Sydney pulled him back and saved Lee's skin.:
Sydney says This water is so beautiful! I love it..
The friend responds Yes, I  think I'm going to jump in..
Sydney responds Wait, you need to stop! It's really shallow here..
The friend responds Oh wow, thanks for stopping me. That would not have been good..
Sydney responds Anytime! Look out before you do anything..
The friend responds Yes, I need to be more careful..