Go on YouTube and search for Kerbal. You will find plenty of examples.
The BFE-5000 mod. It was designed to go with 3-meter-wide parts from other mods... at a time when the stock parts were only 1 meter wide. The engine itself is about 15 meters at its base. It's practically impossible to use all 22,000 thrust power at maximum thrust (stock parts only reach 3,200 thrust. Yes, the BFE-5000 has 7 times the thrust power of the strongest stock engine!). You generally either runs out of fuel very quickly, or, more commonly, destroys EVERYTHING ABOVE THE ENGINE. Note: It's so wide at the base that, in past versions, it invariably bumped into the launch tower, which resulted in flipping the rocket over. So even if you managed to get it to leave the ground without exploding into a zillion bits due to the unbridled power of the engine itself, the resulting collision would eventually explode it anyway. But if you got it to work, a single-stage-to-orbit rocket was quite feasible (at a time when SSTO was generally unheard-of in KSP, no less). And... it's really silly looking. The name is possibly a DoomShout-Out. The removal of the launch tower in the later versions of the game means that there's nothing for the nozzle to bump up against... so BFE to your heart's content...!
Angering the Space Kraken BIG TIME just by making a few Gigantor Solar Panels break off of his spaceship.
That came off easily. Too easily... *Kraken mode engaged, followed by the Awesome Face song* WHAT IN THE CRAP! *Pauses game, notices glitchy Kerbal* What the hell is this!? *Pauses again* *Again* THE POWER *You know the drill* OF KRAKEN *Once again...* COMPELS YOU!
Managing to BREAK PHYSICS ON KERBIN. As in, the objects-floating-around-not-colliding-with-other-stuff breaking physics. The kicker? He did so just by making a Fragmentation Rocket.
That's actually because version 0.20 fixed the Lithobreaker glitch, but still!
Using an asteroid glitch to stop his craft in orbit and make it so Kerbin's gravity no longer affected it, then [[Up to Eleven warping time to 100000x and watching Kerbin whirl around many times a second while he stood motionless.
Absurd Contraptions: Making a drop pod that can only slow down using winglets, and making a cannon that uses lander cans to get back to Kerbin. The kicker? They work perfectly. And we're talking about a guy who loves to make odd contraptions to torture Kerbals.
His 50k subs special consists of him making a SACRIFICING RITUAL by strapping 50 Kerbals to a weird machine and sending them to Jool via Hyper edit, each Kerbal representing 1k subs. Funnily enough, Jool doesn't end up destroying the universe. He then retries on the Mun and activating Dynamic Warp. The result? A spaghettistorm of Kerbals going everywhere as the rocket explodes, distorting to horrifying degrees. This guy doesn't use the Kraken; HE IS THE KRAKEN.
Arriving on the Mun with the most basic parts to do some science and thus unlock more parts with his research... only to realize he forgot to research solar panels and thus can't send the data back home due to a lack of energy.
Jury-rigging water vehicles using nothing but intakes. Yes, not even engines, just intakes.
Making a Christmas Tree to be nice to the Kerbals after all the torture they had to put up with... only for the tree to start rapidly shaking and explode, killing most of the Kerbals.
Give the Kraken a host, glitching him so hard he started traveling at spaceship speeds, creating several whips out of nothing but decouplers and wings (which at one time acquired a life of its own), accidentally sending a bunch of launch clamps into space, temporarily turning Kerbin into what looked like a faded jelly replica, sacrificing a pilot to the kraken by loading him into a destroyed universe, and generally screwing the game up so hard even the menu glitched. All in one video.
One of his latest videos shows him making a command pod spin around really fricking fast, causing a strange flickering effect, making Kerbin look like a faded jelly replica of itself (again) that you can see all the stars through. Danny's idea to stop the spinning? Bump a Kerbal into it. The pod flies off into Kraken-knows-where, and the poor Kerbal is left spinning wildly in orbit. Cue demonic-sounding noises and a wacked-out outro.