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