Rock Trait

[Maus]

I usually just lurk, but I have a question that I can't find the answer.

My Sim had a kid (now a teenager) with Jon Leson. I traveled to Sims-china (forget name).  When looking at my family I see my sims teenager had 5 traits, one of them being rocker.

I have seen the pizza lover, salute and traits from a fireman, but I never saw rocker before.  What does it do?  Anyone ever have a Sim with this before.

[Naga]

http://sims.wikia.com/wiki/Hidden_trait

[Maus]

Thanks for the answer. I haven't noticed any air guitar, but I'll keep watching.

[Naga]

It's just like the wrench-throwing thing that Handy sims get; Just leave the sim idle and he/she will eventually do it.