Crippled Goku (23rd TB) power level

[Hector]

Did he beat Piccolo only by catching him off guard? Who's the strongest foe he can beat without catching them off guard?

 

[Power Level Guy]

Headbutts are really powerful

 

[GSM123]

Piccolo was on his last legs too. I don’t think he’d defeat a healthy opponent of that power.

Also worth pointing out Goku put his all in that headbutt. He couldn’t even move after. Amped headbutt lol.

 

[Animelover5487]

Piccolo was on guard. Both were extremely hurt, Goku just has better ki amp and was able to make the most of that headbutt.

 

[Power Level Guy]

Piccolo was on guard. Both were extremely hurt, Goku just has better ki amp and was able to make the most of that headbutt.

Yeah, it’s more of desperation, pivotal moment type of thing.

Gohan does nearly the exact same thing to Raditz. Piccolo doesn’t have armor on as well.

Turns out headbutts are super powerful just like in real life. A headbutt hurts bad!

 

[GSM123]

It's a thing that gets forgotten a lot, but it's around this time that characters better learn about focusing their Ki for specific attacks. Before the only way to gather Ki into a single spot was with Ki attacks, but it seems like Kami training lets them do it with any attack. I'd even say Oozaru Fist is a precursor to this.