Next Halloween i will be Jason Voorhees...The only Problem i have is...HOW DO I SCARE THE PEOPLE ??? I cant jump out fast and scream

Jason allways moves slowly... PLZ help me. Gimme some ideas... Should i make a GraveYard Scenario in my Haunt with a Grave with "Here lies Jason Voorhees" and then sit up ??? Or a empty Jason Grave and if they pass i will come from behind or somethin like that.

PLZ gimme some tips