I’m sorry, but this violates the well known law of cartoon physics wherein a sufficiently powerful acceleration will always leave the intact skeleton behind.
The Flash does not operate in the same world as Itchy and Scratchy.
Why, just in case some supervillain infiltrated his Batcave with dehydrated goons, of course!
In Wallace & Gromit A Matter of Loaf and Death, the diesel pump can be switched over to tea.
In real life, a waste disposal system runs smack through the center of our pleasure organs.
Go figure.
Was this well-known law of cartoon physics first violated by the Road Runner or Speedy Gonzales?
You’ve never read a “Jimmy Olsen Superman’s Pal” Silver age comic book in your life have you? Well… you stay safe and keep that virginity young man.
Even as kids, the cartoon where the Superfriends were told about a problem in "the Bermuda Rectangle" made both me and my brother wince in unison.
Surely that was intentional.
Sometimes that doesn’t make it better.
It was Superfriends. So no, I don’t know that it wasn’t general stupidity. 
Seriously. Especially in regards to B:TBATB, which isn’t just a comic book show, it’s one of the campiest comic book shows out there.
The skeleton part I can accept; his whole physiology, not just his muscles, is adapted to moving at great speed.
I want to know how the hell he gets such good traction with his shoes, and why whatever he’s standing on during these fast starts doesn’t do a Newton’s Third and go sailing off in the opposite direction.
The same reason inertia doesn’t bother him in general. The Speed Force. He borrows all his momentum from another dimension. He doesn’t have to deal with Newtonian physics unless he wants to.
Like Chimera said, science works differently in their universe.
That’s not hard to explain. He’s capable of holding things gently, without crushing them. You can pick up a grape without crushing it, right? Same thing.
A bigger question is why the ship stays in one piece, when logically it would break in half under its own weight, like The Titanic. And the answer to that is: he has an invisible aura of invulnerability. This extends around any object he picks up, holding it together.
I may have to spark up a doob in solidarity, 'cause someone was high when they came up with that shit.
Didn’t one of the Superman movies have a similar error to the one in the OP? It was the one with the nuclear-powered clone of Superman. IIRC, Supes disposes of him by dropping him down a cooling tower, straight into the reactor core of a power plant.
The first words behind that Wikipedia link are: “This article has multiple issues”.
I’ll say.
The finger covers quite a bit of the surface area of the grape. Try to gently pick up the grape with a sharp needle point.
And howscome Aquaman needed an AquaScooter? His main power was swimming. It’s like the flash getting a moped.
Aquaman needed an AquaScooter because the powers that be behind SuperFriends would not, nay, could not stop themselves in their efforts to make him the lamest superhero of all time. For awhile in the 80’s in the comics, IIRC, the Flash had a van (so he could transport groups of people at superspeed) to which he could impart his velocity, but some Rogue or other totalled it.