Being very very inclusive

I was working with Delphes and ROOT wanted to be really sure it included the correct header files!

The pain was there all along!

If you look in the test directory of a ROOT distribution you'll find a file called ctorture.cxx:

That's right, torture is actually built into ROOT by default! It was before our very eyes all the time. Someone call Amnesty International. Thanks, Alex!

ROOT WIN!

For all its problems, ROOT sometimes does allow us to make beautiful things quite easily. For example, here's what the CMS endcap ECAL looks like in (x,y) and (η,φ) spaces.

More is less

From the TObjArray documentation:

The array expands automatically when
 objects are added (shrinking can be done by hand using Expand(),
 how nice to have meaningful names -:)).

At least they included a smiley.

Feeling cross

I have no idea what Mark was trying to do when he made this plot. Those are some huge error bars.

Tetris fail

Gravity defying tetris blocks!

No architecture. No operating system. No compiler.

It turns out ROOT is no longer supported on any operating system or with any compiler:

Thanks to Nicole for this screengrab!