"Likewise, an increase in personal performance (regardless of whether it is caused deterministically or by the agency of Lady Fortuna) induces a rise of serotonin in the subject, itself causing an increase of what is commonly called "leadership" ability. One is "on a roll." Some imperceptible changes in deportment, like an ability to express oneself with serenity and confidence, make the subject look credible--as if he truly deserved the shekels. Randomness will be ruled out as a possible factor in the performance, until it rears its head once again and delivers the kick that will induce the downward spiral."