This happened in the United States, in Lawton, Oklahoma, and could well make you think twice before ringing your friends' doorbell next time.
In the video you'll find above, you can watch a man walk towards one of his friends' door and gently put his finger on the doorbell, before being savagely attacked in the eye by a snake. A bite that made this American man cry out in pain, but still manage to find his way inside the house, covering his eye with his hand.
The 150-centimetre-long reptile was visibly on a lamp just beside the doorbell, and was likely frightened when the man pressed it. Fortunately, this incident was more scary than it was harmful, since the snake was not venomous.
Nonetheless, the victim of this sudden attack was still rushed to the emergency room. Meanwhile, the reptile was subsequently slaughtered by a neighbour.
Take a look at the video above to see the footage for yourself...