--- a/.vimrc	Wed Oct 09 20:20:28 2013 +0900
+++ b/.vimrc	Mon Nov 11 21:25:20 2013 +0900
@@ -49,6 +49,10 @@
 vnoremap < <gv
 vnoremap > >gv
 
+" bubble lines
+nmap <C-Up> ddkP
+nmap <C-Down> ddp
+
 syntax on
 filetype plugin indent on