The last e-mail had pushed him over the edge.
He picked up his keyboard and used it like a baseball bat, swinging at anything and everything in range, screens, phones, people, nothing was safe.
A few keys fell out, and he picked them up and started eating them.
He then ran as fast as he could and flung himself at the window. He bounced back. He tried another three times with the same result, but finally managed to break through the glass and fall on the fifth attempt.
The suicide attempt failed, he forgot he worked on the ground floor.