Just for fun, I decided to map out a bit of the region beyond pack's normal range. The results were... interesting.

ord	pack	len	chr
0	64		�
112	65		p
97	66	89	a
110	67		n
105	68		i
99	69	93	c
58	70		:
32	71
109	72	97	m
101	73		e
109	74		m
111	75	101	o
114	76		r
121	77		y
32	78	105
119	79		w
114	80		r
97	81	109	a
11	82		p
0	83		�
0	84	113	�
0	85		�
0	86		�
0	87	117	�
0	88		�
0	89		�
0	90	121	�
0	91		�
0	92		�
0	93	125	�
0	94		�
0	95		�
67	96	129	C
97	97		a
110	98		n
39	99	133	'
116	100		t
32	101
108	102	137	l
111	103		o
99	104		c
97	105	141	a
108	106		l
105	107		i
122	108	145	z
101	109		e
32	110
116	111	149	t
104	112		h
114	113		r
111	114	153	o
117	115		u
103	116		g
104	117	157	h
32	118
97	119		a
32	120	161
114	121		r
101	122		e
102	123	165	f
101	124		e
114	125		r
101	126	169	e
110	127		n
99	128		c
101	129	173	e
0	130		�
0	131		�
0	132	177	�

Besides the panic: memory wrap and Can't localize through a reference, one other thing stands out: pack u78 uses a space as the delimeter. In cases where you can't quite get your code to fit into a u45 format (starting with an m), it's a viable alternative, and has actually been the shortest construction I've been able to find for more than one challenge.

The run of chr(0) from u83 - u95 is unfortunate, though. An eval'd string beginning with the null character seems to terminate immediately, without error, for whatever reason.