turtlxe at tumblr wrote:

"I vote we sign a petition where Sam and Dean do nothing but pull pranks on each other whilst still solving an actual case. But the case will be really unusual and odd that they can't find any explanation for it at all and they kinda end up with no answers for what's happening. Then in the end you find out that it wasn't actually a case, but Castiel pranking them both"

(Write in the comments if you want Gabriel to be included too)