Quoting:
I saw this movie on Sci Fi once, I think I thought I was watching a different channel, but anyway, it involved Aliens, and the Aliens would like abduct people by like making a circle around them and then both the alien and the person would disapear.  Ill describe the plot.

It takes place in a rural area at a farm house.  There are seven charactors, theres three men and three woman, all good friends.  Two cupples, and one extra guy and girl who arent dating.  The other charactor is the town Sherrif.  Anyway, Ive only seen from this scene on: one girl is playing tarot with another girl, this other girl is named "Iris," and is the only girl who hasn't a boy friend, and she draws up that Iris would die that night, so then, in disbelief, Iris heads to bed, when she bumps into the single guy, Mike I believe his name was, and comments to the other girl on him being hot.  so then Mike over hears this, and stands outside her bedroom door, and notices something suddenly form in the hallway, and then disaper, which causes him to yell, and gets everyone's attention.  So Mike was forced to confess that he was sorta "stalking" Iris, and they got off to a bad start.  so the next day, Iris goes outside to have a cigerette, and never returns.  Then the two other guys, and Mike, go outside, and cannot find her, and then wonder through the corn fields outside and find a huge crop circle.  Then the Sherriff comes in to investigate this, and whilst he is parked by the crop circle looking around, something comes from behind him, and thats all we see.  Later, there is a knock on the house door, and its the sherriff, and he explains how he almost died.  And then it is determined that iron and electricity keeps the aliens away.  Then they head back otu to the car, in hopes to drive away, but get ambushed by the aliens, and one of the girls decides to walk up to an alien, but then Mike runs up and pushes her away, making the alien chase after him.  Then he winds up in the middle of the corn field with a few aliens chasing him, and he gets stuck, and killed.  So then they go back inside, and the sherrif takes out his gun, and give a shot gun to one of the men, and the other man decides to take a spere of some sort for some reason.  An alien then appeared in the living room, and they shot at it, and it fell down, then the man with the spere walked up to it and stabbed it a few times with teh spere to see if it was dead.  It wasn't.  But the Sherriff and the other man shot it again until it disappeared.  Then another alien formed behind them, and the spere man went up to it to try to kill it, but the alien made a circle around itself that only covered the front half of the man's body, and then the alien disapeared, cutting the man in half.  The aliens then shut off the electricity, and the sherriff went outside to turn it back on, and they got it, and then the house filled with aliens, and then the sherrif told everyone to leave, and that he would handle the aliens, and then the guy and his girlfriend got into the car, and then the other girl, and the guy tried the car a few times, and it started, and they left.  Meanwhile, the sherriff was baked into a corner in the kitchen, next to the stove, and he undid the back of the stove, and took out the gasline, then he proceeded to take out his cigerette lighter and light it, making the whole house explode, adn that was the end of the movie.

Any clue?  Thanks.
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Could you be more specific?  J/K  ;)