Kyle was so overconfident about his mathematical skills that he failed to study thoroughly enough for his final math test to get a passing course grade. kyle's experience best illustrates the dangers of
In this scenario in regards to Kyle's experience he then became overconfident putting him in danger of failing the subject due to failure of exam in Mathematics. The danger of trusting one self too much can put us to failure.
Be overconfident about something because you end up underestimating and exam or whatever thing. It is not a good idea to take for granted things in life because everyhing has always a certain degree of difficulty.