How I met your mother fans - Come and look!?

ok you all know that barney can't drive right? he always takes cabs, and there was even an episode in which Tedd tried to teach him.

Though

at episode 18 or 19 , season 2, when tedd moves in to live with Robin, Barney steals his truck. and he drives it.

So what's the deal?.. is it a mistake?..How I met your mother fans - Come and look!?
Oh wow i never thought about that! That's pretty funny thanks for pointing that out.How I met your mother fans - Come and look!?
May be it is a mistake, but I don't watch all the episodes of how i met your mother seasons and i m watching episodes from here.