Every one of us have faced such moments. It may require just few to about 90 seconds to develop them.
As we tend to look at these innate instincts, they seem magical at times..and then either we fall for those people or just don't feel anything or may be won't even think of them again..
Don't know what to call it, but it definitely proves to be true in further life.. may be that's what we call love at first sight / first meet and you just can't get over it ever.
इक रंग मैं तुझे लगा दूँ, तेरे इश्क़ का !