The answer is :Inhibition
Lowered inhibition caused by low doses of alcohol can make us feel more relaxed or even excited more than usual.
Even though those states might not sound bad, If we face a certain type of social situation when our inhibition is lowered, we might choose to engage in reckless / risky behavior that can put us in danger.
For example, when we are involved in a conflict with other person when our inhibition is lowered we are much more likely to show less restraint in saying provocative things. This can make the conflict escalated into a physical one.