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