You are seeing this page because this account is using massive amount of CPU resources on the server, and it was temporarily disabled. If you are the owner of the domain, we recommend to upgrade it to premium to avoid seeing this page in the future. Upgraded accounts have unmetered traffic and almost unlimited resources. On the other hand, you might be seeing this page because your page is under DDOS attack (someone is sending massive amounts of 'trash' traffic to your website) - such attacks are stopped on our systems automatically and you should see your page back online shortly.
www.000webhost.com is the most popular free web hosting provider, and as such, suffers from abusers. Around 5% of users sign up here just to start hacking or phishing websites or causing other problems. So, in order to survive, we must monitor what our users are hosting.