Nothing! You can't cross scalars and vectors.
Deez Nutz
He was always dotting his T's and crossing his I's. (I made up this joke myself)
Two. But I don't know how they got in there.
Nothing, you can't cross a vector and a scalar.
He really wasn't feeling up to it.
Bolognese sauce
A pineapple
Nothing, you can't cross a vector by a scalar. EDIT: changed multiply to cross.
Nothing, you can't cross a vector with a scaler.
You can't cross a scalar and a vector.
No one knows. You can't cross a vector and a scalar.