Text Box: diver in trouble real fast - especially males - is Bravado or ego. Individuals that are big on bluff and bluster often exhibit unsafe attitudes and dive habits. As an instructor, these type are easy to recognize, but sometimes difficult to deal with. On the one hand, I don't want to damage the mucho - but one the other hand, I don't want to lose the guy to his own ego. 
Unfortunately, even some instructors are guilty of bravado. This is a poor practice! It gives the students the feeling that they have to "be as good as", or "If he can do it, I can do it". I've been asked the question, "What's the deepest you've ever been?" This question is a dead give-away - this guy thinks that going deep is mucho... 
Bravado type behaviors can also result from peer pressure. Too often divers are made to feel like they are "nobody" until they've gone to this depth or swam that distance. Often, such boasting results in divers pushing themselves to greater and greater depths without benefit of an Instructor's presence 
Safe, experienced divers aren't created in a few days or a few dives. It takes bottom time and ongoing practice to develop and perfect the skills required to overcome negative behaviors and instill confidence in one's own ability. 

Text Box: Important Safety Note
For reasons of diver safety, Underwater Adventures recommends that you purchase BCs and other scuba life-support equipment only at a professional dive school.