You know.. the last pose is a famous pose by a Japanese comedian. He always does it on the Ninja Warrior (Sasuke) tournament.
Actually I took the poses off other superhero and kamen riders. 1) standard KR W pose (didn't quite get the left hand right though) 2) KR Kabuto 3) KR Kuuga 4) KR Wizard 5) common three-point landing (this one here was from an Iron Man image from Google) 6) KR Fourze