Because they shared genes!
The pirate says, "Argh!! I don't know but it's driving me testicles!!!"
They both moust go down in emergency.
Share ya laws.
Hearing AIDS.
Because twins being destroyed by planes is too cliche, I guess.
The Twin Towers.
They both want to unzip your genes! credit goes to Hank from CrashCourse on Youtube :)
Pull down its genes.