Why every so often does my father get up from his chair and walk into another room and urinate on the floor? He also used to chew tobacco, which he has not done in 10 or so years, but he will spit out "tobacco " as if he does have it in his mouth? My mother will also sometimes seeing him putting his hand up to his mouth like he is holding a glass and drinks out of it--of course there is not a glass in his hand. Is he hallucinating, going back in time?