Tiger Woods Fidgets with Digits

4/6/2010 6:21 PM PDT BY TMZ STAFF
Uhh ... Rachel, is that you?

Tiger Woods might want to think twice about whipping out his cell phone in public.

Not to worry, the explanation for this pic at Augusta National today has nothing to do with sexting.

Golfer Mark O'Meara -- pictured above -- says Tiger was filming Mark's putt so they could analyze his technique.

Tiger ... always quick with a tip.