It's those ESFP who take the MBTI test and think they're ENTJ's. They get really energized about how intelligent, competent, and knowledgeable they are, and how successful their ideas are going to be. They vigorously outline details about the plan they have to make money, start a business, and so on, thinking that their goals are bound to happen and be 100% a slam dunk and basically want everyone to know that.
The Se/Te tranced ESFP's basically have confidence they can do whatever they want because they believe in their knowledge. Because they have the Te, they are receptive to facts and figures that support what they believe they can do. Because they aren't that great at Te and really bad at Ti, they see only the positive facts and figures that support their self belief and figure the rest will sort itself out, or they will make the rules up as they go. Because they are bad at Ni, they fail to recognize in advance the negative scenarios that threaten to counterbalance the positive ones they put all of their ego into thinking about.
Also, it takes a hefty argument, stubbornness, a bit of meanness, and a lot of persistence to snap an ESFP out of an Se/Te lock. The same is true of ENTJ's in a Te/Se lock (though they more need someone who cares enough about them to warn them that their actions will hurt someone).
Worth noting, a couple other related things: 1.) a lot of Se/Te-ish ESFP are NOT recognized as ESFP, and 2.) There are Se/Te-centric ESFP who aren't unhealthy. They're just more naturally ambitious and informational; whereas the Fi/Ni ones are more artistic and interested in their relationships with others.
