Part two...
DiNozzo waved goodbye to Ziva. He was probably going to pay later, whether it was Ziva or Gibbs. He had on floor to prepare for his next victim, before McGee joined him.
"Morning McGeek" He said cheerfully
"Ugh, you obviously haven't checked in with Gibbs yet, he defiantly woke up on the wrong side of the bed." McGee told him glumly, Tony smiled
Tony went up to the doors, grunting and straining, pretending to try and yank them open.
"What the?..." McGee started
When the doors did open, Tony shyed away, firstly as part of the act and secondly because Abby was standing outside them.
"Hi boys" She said cheerfully, walking into the elevator
Tong grabbed her hand and shook it vigorously "Good Morning Abigail, please address me as Very, Very special agent DiNozzo. In case of an emergency, there is a main exit and another emergency exit above your head. In case of a cable severage, I suggest you take up the seated position with your back braced against the wall, put your head between your knees and kiss your butt goodbye" He said with a grin
"Did you take painkillers or something?" Abby asked him in all seriousness and she and McGee shared a look.
"Tony hasn't been up to see Gibbs in the squad room yet" McGee told her
"Oh!" she replied
"Actually, I think I'll go and see him now" Tony told them, pressing the button. He pretended to jump back in shock.
"I got zapped!" Tony complained, smiled and did it again and again.
The Doors opened and Tony saluted farewell to his fellow travellers and walked out into the squad room, feeling relaxed. But it was too quiet.
"DINOZZO!" Gibbs bellowed
The basics: In an elevator...
Grunt, strain and pretend to try and yank open the doors, look embarrassed when they just open.
Greet everyone with a warm handshake and ask him or her to call you Admiral or another name.
Pretend you're a flight attendant and review emergency procedures and exits with the Passengers.
Push the buttons and pretend they give you a shock. Smile, and go back for more.
You could also...
Crack open your bag, peer Inside and ask "Got enough air in there?"
MEOW occasionally.