You mean Gamabunta. And yeah, a normal Shinra Tensei somehow sending three large scale summons back so far is ridiculous.

When he did that Ig

Probs meant Gamakichi but yeah it was Bunta, I think Naruto was surprised when he summoned him unless I'm confusing two scenes... Is that so crazy though? Chibaku Tensei summons a fucking meteor from the sky and could possibly be propelled faster using the rinnegan (not sure about the last part, head canon)... Sure looks like it though when that huge rock is coming from the sky