then why you ask if you saw it?

i think he want an answer how did that guy do it .

It is very much possible. The exp reward from Daily Practice gets doubled on Tuesday, add the weekly mission exp to it + Team Instance exp. As you are leveling, take note that you can start doing Wanted Missions at level 55, so keep doing that everyday (2x the exp if you do it in a team).

As a random note, you can save some exp in the mail, this includes stuff like jinchuriki, quiz and even nine tails (if you leave before the event ends)

So...

It was either he was saving his "Story Missions" or he received a large amount of experience points from the "The Eternal Will of Fire" event (returning packs).