The Snowball Effect / One Krabs Trash - S3-E3
Other mistake: One Krab's Trash: When Mr. Krabs sticks the ghost drawing in SpongeBob's window with the fishing rod, the shadow of the paper is visible on SpongeBob, but there is no shadow of the fishing line holding it up. (00:17:27)
The Snowball Effect / One Krabs Trash - S3-E3
Other mistake: In 'The Snowball Effect' when Squidward attempts to make Patrick and Spongebob resume their snowball fight he throws a snowball at them which they avoid, and it puts out Squidward's fire inside. Squidward had his back towards his house and threw the snowball in the opposite direction.
Answer: I think that this was supposed to be an intended joke. Patrick is too stupid to remember or achieve most things and SpongeBob is able to remember and achieve most things, but the one thing that SpongeBob cannot achieve, is the one thing Patrick can achieve on the first go.
Casual Person