diff --git a/_Footer.md b/_Footer.md
index 1ec35f1..f14d700 100644
--- a/_Footer.md
+++ b/_Footer.md
@@ -3,4 +3,5 @@
 ```vim
 " If more than one window and previous buffer was NERDTree, go back to it.
 autocmd BufEnter * if bufname('#') =~# "^NERD_tree_" && winnr('$') > 1 | b# | endif
-```
\ No newline at end of file
+```
+(Careful if you are using vim-plug: if you set this config and run 'PlugInstall', for instance, while your cursor is on the NERDTree, it will crash!) 
\ No newline at end of file