2.
This alternative use for doors:
3.
This sticky situation:
5.
This post that has no explanation:
8.
This perfectly appropriate gif:
9.
This constant in our lives that we will never get used to:
10.
This great summary of dogs:
11.
This universal truth:
13.
This summary of most people's position on bugs:
15.
These two questions that need answering:
16.
This excellent comeback:
17.
This summary of humanity:
18.
This python-induced realisation:
19.
This strangely true fact:
20.
This contribution to the discourse: