Sentence:  Why do my readers and informants so delight in <WSD>bloopers</WSD> and boo-boos, fluffs and flubs, and goofs and gaffes? ... The humor in <WSD>bloopers</WSD> lies, in part, in the listener's awareness of the speaker's vulnerability. It is the very artlessness of linguistic lapses that makes them so endearing and makes us feel superior. 
Meaning of the word marked with <WSD> tags:  A blunder, an error.