Not the expert on this, but Tesla whistle and Tesla shorts come to mind immediately. There are more subtle ones, e.g. the Tesla respirators right when Covid hit.
I think Tesla shorts was just him having a laugh at the investors shorting Tesla and showing confidence in the company. It increased media coverage of, and popular discussion about, the number of Tesla shares sold short. It wasn't about hiding or suppressing it, it was about showing that he wasn't concerned and was in some sense, "standing up to" the people predicting Tesla's demise.