There is one friend of my friends that pretends he is smart and he thinks he know everything. Example he come to me saying "hey how are you" and then he say "so yesterday you were at home on pc?" and i say "no i was at a" and he intrupts saying "So i knew you were home" i say "no i was" he interupts again "So i knew you were home".. And my mind wanna explode. This is just an example.. Second example .. I studied whole month for a test and he comes after test saying "i know you didn't studied you gonna fail bro you gonna fail so hard better don't show up".. Even though i told him i studied he "KNOWS" that i didn't study and he won't accept the fact that i did and i don't care really but he boils my mind i lose 10 iq each time i talk to this guy. I can sense when someone is joking but he is always serious and this what i described here is something most of people have problem with him.