When on-scene it is important to Understand the whole situation before jumping in and to maintain that understanding throughout. Know What’s going on, What/Who is involved, and What all the dangers (real & potential) are. Make sure you know what’s going on. Do your own “size-up” even if IC has already done one. Don’t rely on the size-up done by anyone else.
Make sure that you are staying Aware and that you have a full understanding of the situation at all times. This means not getting hyper-focused to the point of losing track of Communications and keeping your head in the game.
Remember Make sure you UNDERSTAND the whole situation and STAYSAFE