While you are engaging in doggy style sex a co-worker walks in and catches you in the act and without hesitation you stick out your hand the index finger and birdie finger extended and point to the girl and say "GET IN HERE"! thus forming the THE BOOTSTRAP TURNER or the eiffel tower!
at a party you talk a girl into going somerwhere to be alone. shortly after starting doggy style sex a man bursts in and you without hesitation say hey get in here! thus forming the eiffel tower or "THE BOOTSTRAP TURNER"