Nothing, you can't cross a vector and a scalar.
I don't know nobody has ever made it across.
Johnny Cage
You can't cross a scalar and a vector.
2...and don't ask me how they got in there. (My 87 year old grandma just told me this one)
Yoda-ling
Nothing, you can't cross a vector by a scalar. EDIT: changed multiply to cross.
No one knows. You can't cross a vector and a scalar.
Nothing. You can't cross a scaler and a vector.
Nothing. You can't cross a vector with a scalar.