1 and his dog went on a hunting expedition and 2 stuck to his foot in a way similar to 3. What did 1 invent after looking at this?

1. 2.

2. 4.

Hint: 4 is a close up of 2.

Cracked by 34 people!
Rc , Priya , Dibyo , duriel , Goyal , yaksha , quaziluffy , Atul Mathew , Miraj C. Vora , Vinay Nair , aditya_s , Suhel Banerjee , udupendra , Kaiser Soze , Debasish , Vijay Shankar , prasanth , vivek , Johny Walker , varuns88 , Ajay Parasuram , priyananda , Ananth , vs , malcaluffin , panrod , gammafunction , shenoyvarun86 , Jean Valjean , Siddharth , Martin , Prasad , vishal and Bipin Banavalikar.

Debasish(2), Rc, Priya, Dibyo, duriel, Goyal, yaksha, quaziluffy, Atul Mathew, Miraj C. Vora, Vinay Nair, aditya_s, Suhel Banerjee, udupendra, Kaiser Soze, Vijay Shankar, prasanth, vivek, Johny Walker, varuns88, Ajay Parasuram, priyananda, Ananth, vs, malcaluffin, panrod, gammafunction, shenoyvarun86, Jean Valjean, Siddharth, Martin, Prasad, vishal and Bipin Banavalikar