Fifty — one to screw in the bulb and 49 to guard him/her.
or
Because an undocumented worker has been living on his head for the past 2 decades!
or
Because the chicken was on vacation.
or
Two, one to call Daddy, and one to get the (pick one:) mineral water/Tab.
or
Mt Rushmore. They're a rock group.. it's a rock...group
or