The puns in this thread are a great example of why people hate puns. Also a lot of them are spoonerisms and not puns, which will get you ejected from a pun contest
Spoonerism. a verbal error in which a speaker accidentally transposes the initial sounds or letters of two or more words, often to humorous effect, as in the sentence you have hissed the mystery lectures, accidentally spoken instead of the intended sentence you have missed the history lectures.
It rarely happens to me anymore, but rare != never.
You struck a blushing crow.