Errors with ASCII faces. Just because.
Based on cool-ascii-faces
npm install --save koa-face-errors
Require in your middleware stack somewhere near the top, it'll catch your Error and slip some fun in the mix.
var app = require('koa'),
faceHandler = require('koa-face-errors'),
port = process.env.PORT || 3000
app.use(faceHandler())
app.use(function *(){
this.throw(500, 'whoops')
})
app.listen(port)
console.log('Listening on port', port)