From certain point of view the Welcome Speech does have a life of it's own. No one can really understand it. Sometimes it just disappears for moths, only to come back again suddenly, and sometimes, brutally posessing members and causing them to do unspeakable things. Only the eldest of us know how to direct the Welcome Speech, but only partially, for it can never be truly cotrolled. You could see the Welcome Speech is the bigger brother of the Welcome Beam, wich is seen more often, and is easier to control. The Welcome Speech rarely appears without the Welcome Beam, but once the two appear together, the results can be devastating. Indeed many newbies feel their life is forever changed by the Welcome Beam. Those who have experienced both the Welcome Beam, and the Welcome Speech, seldom speak about it. But when they do, the do it with deep fear and sincere admiration. It is difficult to say how they choose their "victims". But many newbies who have been spared from them feel some relief, but cant help to wonder what would it been like to face even one of them.
These, "things", are only two of the many mysteries that still haunt the halls of HLP. But they cetainly are the most common, and the most powerfull of them all.