One of my favorites!
Played in a circle (minimum 9). You start in the middle to explain and begin the game. The goal is to get somebody to take your place. The game is played in rounds with an explanation of the rules before starting a new round. I usually timebox this game to 10-15 mins. This is great for tension relief in a group or for getting them prepared for an upcoming interactive session.
Round One
You approach someone in the circle and say either Bibbity-Bobbity-Bop or Bop. In order to avoid replacing you in the middle the person must respond as follows:
- If you say “Bibbity-Bobbity-Bop”, they must say “Bop” before you finish.
- If you just say “Bop”, they must say nothing.
Tip: Demonstrate and share that standing close to people makes them uncomfortable and likely to slip up.
Keep playing this round for a few turns allowing the person in the middle to be replaced with different players. Typically, somebody gets stuck and finds it difficult to get out. This is the time to step in and give them another method of getting someone in the circle to replace them.
Round Two
As well as using the method from round one the person in the middle can say “James Bond 1,2,3,4,5,6,7,8,9,10.”
Before you finish counting to 10 the person you challenge must adopt and hold the James Bond pose.
In addition, the players either side must adopt the position of bond girls who adoringly cry “Oh James, Oh James.”
Now you have three potential victims who may slip up and replace you in the circle.
Round Three
Add “Elephant 1,2,3,4,5,6,7,8,9,10.” Keep rounds one and two as options also.
When challenged the player adopts the elephant position. The players either side form the elephant ears. All three must be in position before you finish counting to 10.
Round Four
Add “Toaster 1,2,3,4,5,6,7,8,9,10.” Keeping everything else as before. 
When challenged the player continuosly jumps up and down like a piece of toast ready in a toaster. The players either side face each other with their arms reaching out to form the body of the toaster around the jumping toast. Anyone not in position by the count of 10 is the new man in the middle.
Round Five
Add “Shower 1,2,3,4,5,6,7,8,9,10.”
When challenged the player adopts the shower pose and pirouettes on the spot. The players either side reach both hands across and in front of the showerer simulating the shower doors opening and closing.
Round Six
If you are still going at this point here are some other adaptations you can try. Bibbity-Bobbity-Bop
Games Simon Plays 
Superb! Can’t wait to do it! Done JB &Elephant before but not toaster, or screaming Viking. Bless you Thanks very much.