I believe they are not affected by flowing water, but haven't tested this. I also haven't tried to stack them without a back wall. --McClaw (talk) 12:35, 18 April 2014 (MDT)
- Both situations will still work. In the former, you'll still drown, of course. --Abcboy (talk) 16:10, 18 April 2014 (MDT)
