Ruby (1.8.6 at least) supports some very confusing and odd if/else/elsif behavior

gistfile1.txt

#!/usr/bin/env ruby

condition = eval ENV["C"].to_s

if condition
 puts "got condition"
elsif
 puts "no condition, looks like elsif nothing works"
else
 puts "yeah apparently you can do elsif nothing and it will run that branch and then also keep checking other if branches?"
end