First the commercial about sending your old gold jewelry in for money. If you have ever dealt with pawn shops or jewelers buying used jewelry, you know that they will only give you about 10% of the actual value. So when the old lady on the commercial says, "I got $600 from my old gold jewelry." That really means that she sent them about $5000 worth of gold. What a rip off.
Second is the shamwow. That annoying jerk spills soda on a small square of carpet. You can see the soda leaking out from under the carpet square before he puts his "shamwow" on it. The camera switches to him getting his shamwow ready, then when it goes back to the carpet square, all the soda that leaded out under it is gone and he hasn't even put the shamwow on it yet. That shamwow must "suck" the liquid up against gravity to work that good.
Lastly, is the male enhancement. The line where the woman says, we have sold so many of these that they must work or we couldn't afford to offer a free trial.
Some commercials are just so bad that you have to wonder what idiots are buying that stuff. Whoops, I just spilled my soda on my keyboard. Where's my shamwow?