If you're going to someone's house for thanksgiving, if you're with a group make sure you're first in line when you ring the doorbell.
When they open the door shout "IT'S TURKEY TIME, MOTHERCLUCKERS!" and make finger pistols and pretend to shoot up the place.
If there are other guests already there, shove your way past the host to where the other guests are and should "IT'S TURKEY TIME, MOTHERCLUCKERS!" while shooting up the place with your finger pistols.