I think....
man, it's one of the most unreasonable thing i saw in this comics :-P...
since the hole 吸力 is so strong and can almost grab all the monsters in front of him.... how come he won't get himself into that hole at all? in comics and cartoon, it seems that only monsters will get into that.... what happened if he "misplace" his another hand in front of that hole? hoo hoo hoo~~~ I don't wanna think of it.