The Trap Door: Routine at EF82

EF82: Script: Load Script Pointer

Replace the entity's script cursor with the absolute address that follows, so it continues from that fragment.
ScriptRoutine_JumpToAddress	EF82	INC HL	Advance HL past the current script instruction.
	EF83	INC HL	Advance HL past the current script instruction.
This entry point is used by the routine at ScriptRoutine_JumpIfCarrying. Redirect the script pointer to the operand address and execute it at ScriptInstruction.
ScriptRoutine_JumpToAddress_FetchAddress	EF84	LD C,(HL)	Fetch the low byte of the new script address.
	EF85	INC HL	Advance the script pointer by one byte.
	EF86	LD B,(HL)	Fetch the high byte of the new script address.
	EF87	PUSH BC	Load HL with the new script address (using the stack).
	EF88	POP HL	Load HL with the new script address (using the stack).
	EF89	JP ScriptInstruction	Jump to ScriptInstruction to execute the script instruction at HL.
View the equivalent code in; Flunky