If, at a certain angle, you approach an insect, you’ll be able to touch it without it noticing. Most of the time, insects will run away from you when you try and touch them, but if you do so from the right angle, the insect will have no idea.
Uh oh, looks like this particular insect is a lightning bug so when you touch it you get a shock (しょく). Did you know that lightning bugs contain bazillions of volts inside them? Well they do, and if you touch one, you get a shock. A very big shock.