The camera gets 'blinded' by the laser because it is so bright, and will distort the image, sometimes it shows a huge dot, sometimes a blurry one, or other effects. Here use this pic as reference, the dots in person are small pinpoints but to the camera it looks like a giant blob of light.
EDIT: The more powerfull the laser, the more the pic will be distored(in close range), notice the blue dot looks smaller than the yellow, that is because the yellow is alot brighter due to power and wavelength.