I want ot introduce to you, shocking if you havnt done it befor.
ITs when you pick the plant pull it up with the roots intact.
So that way you can boil some what, and put the roots in there for like 30 secs.
All the thc will go straight 2 the buds.

Also use you finger nails to cut off the tips of the leaves.
That way the plant will make up for the loss of plant matter by secreting more THC molecules where it was injured.

And yes poking the buds with a needle will have the same result.
More thc but less bud.
Because the plant will have to commit energy into healing rather then producing more yeild.(and part of healing includes more THC in the plant)