怒蠅拔劍 angry at nothing

怒 (anger) 蠅 (fly) 拔 (draw) 劍 (sword)

You draw a sword upon the sight of a fly.
Mighty anger caused by... a trifle.
A fly, no less.

Feel sheepish?
Just don't let anyone see you doing that.

Haaaaai - yaaaa.