How can I get the Moustachio achievements in Left 4 Dead 2?

There are two achievements related to Moustachio in Left 4 Dead 2.

These are the descriptions:

1. Gong Show - Prove you are stronger than Moustachio.
2. Stache Whacker - Prove you are faster than Moustachio.

Do you know how can I get them?

Solution 1:

Yes,

• Gong Show: You need to inject an adrenaline and hit the gong at the strong man game, see here
• Stache Whacker: You need to quickly hit the Moustachios on another game (don't know the English name), see here

I got them both, it's not difficult.

Solution 2:

You can get Gong Show by getting a tank to hit the gong for you. Much more fun than using up your adrenaline!