Nothing, you can't cross a vector and a scalar.
It got stuck in a crack.
A door to door salesman!
A bit neurotic.
Deeeeeeeeeeengue
Nothing, you can't cross a vector with a scaler.
Nothing! You can't cross scalars and vectors.
Nothing, you can't cross a scaler with a vector.
Nothing, you can't cross a vector by a scalar. EDIT: changed multiply to cross.