@mogima your instructor could've told you depending on what type of bear you're expected to find in an area, but the classic suggestions are play dead for grizzlies and make sounds and try to look bigger for blacks.
This has to be a really heavy case afterwards for Sakaido, not only did he had to die multiple times but work so hard to save the "lives" of others in the well and having it not only be meaningless but also detrimental for solving the case.