Absolutely awesome! Please make more of these; watching every detail was so amazing: watching the landing gear struts crush down and the tires skidding up to speed was absolutely stunning!
What's with the landing gear of the 767 and the A380, they seem to be the only aircraft with the front tyres hanging below the back tyres on the rear/main bogeys. All other aircraft have the rear making contact first, followed by the front.
Stunning! We've been considering the GH4 and wondering how good the slo-mo would be with aircraft - so happy to see your outstanding results! Do you recall your shutter speed? Are you shooting with ND filters? Great job! (Yes, lotsa !s in this comment but it earned them :) )