Memory Safety SignsVersión en línea This will help you practice safety signs. por Julianne Linza People are keeping this community safe. It could electrocute or shock you. Hazardous, toxic materials like blood are in here. Do not pick this up! Watch where you are walking. Firefighters and EMTs work here. This is a place where young adults who are in trouble could go. Keep matches, lighters, and cigarettes away!