Tripper is the fifth studio album by American math rock band Hella (drummer Zach Hill and guitarist Spencer Seim), released on August 30, 2011, by Sargent House on CD and vinyl.

"[5] Slant magazine was critical of Tripper, commenting that "there's a certain threshold for this kind of demanding material before it gets tiring.

It's one that Tripper, staunchly dominated by an old-school style of wanky craftsmanship, crosses pretty quickly.

"[6] Other reviewers were more positive, with Magnet magazine stating that "(Tripper) is the most blistering set the duo have put out in a long time" and AbsolutePunk stating that "Tripper sounds like Hill and Seim naturally hashed some tunes out--just with some better years of experience behind them to reflect back on.

"[7] AllMusic's review reads "(Tripper) gives them a kind of spastic, jagged sound that puts them somewhere between Lightning Bolt and an actual bolt of lightning, and makes Tripper an album that's more likely to wear listeners out physically than mentally.