being in a wall means you cant breath and thus suffocates you
sandwall tunnels can come crushing down on your


git-svn-id: http://svn.net-core.org/repos/t-engine4@317 51575b47-30f0-44d4-a5cc-537603b46e54

git-svn-id: http://svn.net-core.org/repos/t-engine4@316 51575b47-30f0-44d4-a5cc-537603b46e54

git-svn-id: http://svn.net-core.org/repos/t-engine4@315 51575b47-30f0-44d4-a5cc-537603b46e54