VIP behaviour question

[root@ve10:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.79:80
   ip protocol 6
   rules myrule
}
[root@ve10:Active] config  b pool foo list
pool foo {
   members 200.200.200.101:80 {}
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when CLIENT_ACCEPTED {
   log local0. ""
   TCP::collect
}
when CLIENT_DATA {
   log local0. ""
   log local0. [TCP::payload]
   TCP::release
   TCP::collect
}
when SERVER_CONNECTED {
   log local0. ""
   log local0. "clientside [IP::client_addr]:[TCP::client_port] -> [clientside {IP::local_addr}]:[clientside {TCP::local_port}]"
   log local0. "serverside [IP::local_addr]:[TCP::local_port] -> [IP::remote_addr]:[TCP::remote_port]"
   TCP::collect
}
when SERVER_DATA {
   log local0. ""
   log local0. [TCP::payload]
   TCP::release
   TCP::collect
}
}

[root@ve10:Active] config  tail -f /var/log/ltm
Jul  5 16:53:29 local/tmm info tmm[5111]: Rule myrule :
Jul  5 16:53:29 local/tmm info tmm[5111]: Rule myrule :
Jul  5 16:53:29 local/tmm info tmm[5111]: Rule myrule : HEAD / HTTP/1.1  User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5  Host: 172.28.19.79  Accept: */*
Jul  5 16:53:29 local/tmm info tmm[5111]: Rule myrule :
Jul  5 16:53:29 local/tmm info tmm[5111]: Rule myrule : clientside 172.28.19.251:36022 -> 172.28.19.79:80
Jul  5 16:53:29 local/tmm info tmm[5111]: Rule myrule : serverside 200.200.200.10:36022 -> 200.200.200.101:80
Jul  5 16:53:29 local/tmm info tmm[5111]: Rule myrule :
Jul  5 16:53:29 local/tmm info tmm[5111]: Rule myrule : HTTP/1.1 200 OK  Date: Thu, 05 Jul 2012 09:05:28 GMT  Server: Apache/2.2.3 (CentOS)  Last-Modified: Fri, 11 Nov 2011 14:48:14 GMT  ETag: "4183e4-3e-9c564780"  Accept-Ranges: bytes  Content-Length: 62  Content-Type: text/html; charset=UTF-8