var user = prompt("You have been approached by a mugger. Do you run, oblige, or fight?").toUpperCase();

switch(user){
    case 'RUN':
       var run = prompt("Are you athletic?")
        if( run === "yes"){
            console.log("You made it away");
        }
        else{
            console.log("He caught up to you!");
    case 'OBLIGE':
        console.log("You better call your credit card companies and cancel them!");
        break;
    case 'fight':
        console.log("Damn, tough guy over here");
        break;
    default:
        console.log("That wasn't one of the options");
}