Moderate traveler here. I travel frequently but haven't yet mastered the "juggling act" at screening. Now I have no problem with part one- I can juggle my ID, boarding pass, carry-on, cell phone, jacket and one-quart oz plastic bag with noooooo problem. What throws me off is the "shoe shuffle". I can slip off one shoe without difficulty; however, removing the second shoe proves disastrous. I don't know if its the one shoe/one footie that throws my balance off, or the hopping on one foot, either way, something or somethingssss always end up hitting the floor.
I believe it is this "crash, bam, boom, along with my frustrated sigh and eye roll that get me noticed by TSA.
I aways get the secondary screening. Wands Up!