Tenso!...?

[cheebacheeba]

What is this?
I mean...I kinda get the basic idea, but...what?
Some examples:

http://cheezcomixed.files.wordpress.com/2009/10/4pane-tenso-chihuahua.jpg
http://www.oesquema.com.br/trabalhosujo/wp-content/uploads/2009/03/tenso-do-cachorro.jpg
http://cheezcomixed.files.wordpress.com/2010/03/129140284297671603.jpg
http://teletube.files.wordpress.com/2008/08/tenso.jpg
http://cdn1.knowyourmeme.com/i/19058/original/ursinho_tenso.jpg
http://acidfingers.files.wordpress.com/2009/03/tenso2cn8.jpg
http://lh4.ggpht.com/_9hdnZu3LT7A/SyYLB9Y-fFI/AAAAAAAAAQo/WYQOP7-oYi4/TENSO_thumb%5B3%5D.jpg
http://tenso.blog.br/wp-content/2009/11/tensodorgas.jpg

What is this phenomena?

[newb]

1ST I'm hearing of it.

[cheebacheeba]

Well, you'd better listen good...because I think it's creeping up on you.
:=||

[missmacabre]

apparently it means tense. Like they are zooming in on a facial expression that is really tense. Idk, theses aren't really funny.

[The_Return]

http://knowyourmeme.com/memes/tenso

I find most of these internet memes pretty inept. No exception here.