What kind of knot tightens as you pull?

Yes, but will be small - which means it is easy to conceal and still packs a punch.

Paralysis, and prolonged exposure (especially to the neck or heart) can kill. You could incapacitate someone, but if not careful, could outright kill or permanently paralyze.

Once all of the blossoms on a given cluster are spent, remove the whole cluster by cutting or pinching the stem down at the next leafy area.

Tie the beginning of a shoe knot: Put one side over the other then pull the top lace under the other lace and pull. Then, repeat the shoe tie knot....

Yes, but it is much harder to do. The needle helps you make a tighter knot than you could do with your fingers alone.

Use a safety pin to slowly pick you way through the knots. This takes patience, but it can be done. If that doesn't work, you may have to cut out...