there is someone

[Unregistered]

I'd like to know the difference between 1 and 2.
1. Someone is staring at you.
2. There is someone staring at you.

Thank you in advance.

[Tdol]

Not a great deal- they both carry the same message. The first could be used when we both know the name of the person and are trying to keep our conversation discreet, and the second wouldn't work there.