What kind of stinging critter is this?

[Armybrat]

My son brushed against it and his armed swelled up, stinging/burning like crazy (as he said). He ran cold water over it then some vinegar which helped with the swelling & lessened the pain.

https://image.ibb.co/g4FRDw/IMG_3028.jpg

[swampman]

spiny oak slug caterpillar, google stinging caterpillar. there are a lot of types of stinging caterpillars.

[gb6491]

https://s1.postimg.org/2p6qt3vd9b/image.jpg (https://postimages.org/)

[Bawanna]

Excellent shot Greg! Minute of bug without question. Good show.

[tony k]

https://s1.postimg.org/2p6qt3vd9b/image.jpg (https://postimages.org/) looks like you were using one of your CW45 models.

[340pd]

Wonderful.

[knkali]

hilarious