Does anyone remember what episode this happened in?

[Rare Talent]

There was a flashback of Nawaki (Tsunade's little brother) with Orochimaru and Nawaki ran into an explosive trap while Orochimaru was looking on.

I can't find it through Google lol

Edit: Shippuden Episode 114 at 1:56

 

[rollin]

It's episode 91
Just find the chapter then find it on Wikipedia and it will show what episode it's on

 

[Hashirama Senjuu]

He hurt my grandson? HE MUST DIE!

 

[SenseiMartian]

Pretty sure it also happened during part 1, the Sannin fight (episodes like 90-100 or so).

 

[S A G E]

Probably during the sannin fight arc

 

[6ari8]

It's the episode about jiraiya's past just before he infiltrates Amegakure.