I've not seen a bear before but I've seen all sorts... frogs.. slugs.. snakes.. some weird lizard thing.. birds.. a dog..

[Focus gone for a moment, he's busy thinking back on the different summons he has seen over the years, though he's pretty sure he never saw a bear. He thinks?]

Yeah, it's just like that! You've got to concentrate to form chakra and use it, then if you run out then you're totally screwed!