This site uses heavy scripts, which can hang your browser:
scanurl.net/?u=example.com&uesb=Check+This+URL#results
"A script on this page may be busy, or it may have stopped responding....
Script: ajax.googleapis.com/ajax/libs/jquery/2.0.2/jquery.min.js:5"
http://sitecheck.sucuri.net/results/scanurl.net/
Status: Outdated Software detected. Immediate Action is Recommended.
Risk Severity: High
Website Firewall: Not Found
Outdated Web Server Nginx Found: nginx/1.4.0