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