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