I slept late most times, during this periods i discover something about we humans.. 'Well if not all humans' is sleep-talking.. My friend who slept in my place one time will wake up to start saying *guy abeg i go give you the memory card tomorrow. Guy na abeg * after sometimes of speaking gibberish type come back to their normal sense.. Same with other people i have encountered.. What could be the cause?

It's a type of temporary schizophrenia. They're actually dreaming, but their brain fires actual signals to the muscles. So, instead of keeping it in the dream world, they act on it.