Emails are down for the screamer forums. However, if you don't appear to be an offsite raider or brigader, your account has been approved.
Small Scary Flash
Small scary flash is a flash screamer. It shows a extremely small picture of clouds but after a while it shows a picture of a skull along with a weird scream. The website is deactivated so it must be accessed over Web Archive servers.
The following website contains a screamer:
web.archive.org/web/20050408072534/members.lycos.co.uk/martyncruise/scare.html