1 - A Long Fall
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Omake - Kakashi:
"It's just cooking." Kakashi told himself, irritated at his own reluctance. "So what if I don't like tempura-" Here his nose wrinkled because fried food was disgusting. "-making Tōsan tendon isn't like creating an A-Rank jutsu."
Then, to the empty kitchen, he wondered aloud, "It's just cooking, what could go wrong?"
A lot. A lot could go wrong.
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Omake - Minato:
For a moment, Minato just stared at his miniature student.
The boy was filthy; some kind of yellow-ish dough matting his usually white hair, chunks of rice stuck to various parts of him along with bits of meat and he was covered in flour. He also had a bandage wrapping his left forearm.
"What happened?" Minato asked, bewildered.
Kakashi looked mutinous as he asked, "Do you know how to make Tendon, Sensei?"
As it turned out, Minato did not.
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Omake - Kushina:
"...right." Kushina stared at the two, shook her head then said. "Alright. First thing? Kakashi-kun go take a shower. Minato-baka, get cleaned up you are on look out duty. You're to warn us if Sakumo-sama is heading home before I manage to teach Kakashi-kun to cook tendon."
Minato blinked as his student went to shower. "And if you don't manage?"
"You'll be living up to your name as the Yellow Flash and get us take-out, while I coach Kakashi-kun through a seal that keeps things warm and hope Sakumo-sama doesn't notice the difference." Kushina declared.
Remember that chapter from Things From Tumblr? Turns out Sakumo was massively overestimating his son's cooking prowess.