If you've seen Rise of the Planet of the Apes, you'll be aware of two things. Firstly, apes can be just as human as we are and secondly, you really shouldn't provoke them.
It's good news all round then in Germany, where a group of lab chimps were allowed outdoors for the very first time. As you can see from the video, they're rather pleased.
Now, we don't speak German but we imagine that whatever they're saying, it's mainly just their equivalent of whooping and hollering with joy.
Trust us, your slightly irrational Monday mood will be gone in a few short seconds...