^.* tells the group \(in .*\): "untrap\s?(\w*)"$
^You tell your group \(in .*\): "untrap\s?(\w*)"$

if currenthp > maxhp * .5 then
	if matches[2] 		~= nil then send("untrap " .. matches[2])
	elseif matches[2] == nil then send("untrap chest") end
else
	send("gt Health too low- aborting")
end