The creature may want to conserve its energy and is thus limiting its influence to a level that is barely detectable. It would be unnecessary to expend more power if this is enough to let it obtain what it wants.
[ Either way, he thinks it's highly likely that the kaiju is far more intelligent than any they've previously encountered before, and that is dangerous.
... ]
I have not felt the need to correct your jumbled idioms before, but I must caution you this one time. 'Knock (them) up' has a sexual connotation, implying that you intend to impregnate the subject of this phrase. I believe what you want to do is to 'knock them to their senses' or 'knock their heads together'.
no subject
[ Either way, he thinks it's highly likely that the kaiju is far more intelligent than any they've previously encountered before, and that is dangerous.
... ]
I have not felt the need to correct your jumbled idioms before, but I must caution you this one time. 'Knock (them) up' has a sexual connotation, implying that you intend to impregnate the subject of this phrase. I believe what you want to do is to 'knock them to their senses' or 'knock their heads together'.