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thank you for the mind picking session and the safety gear
I didn't think air could turn that fast!! mind blown!! that explains this:] 
Notice
how the snow packed into the high presser areas around the step box pounding out the abrasive corners into nice aero fillets changing the force vectors and pressure grandaunts ,this profile would yield a forward force instead of just down with less space to apply due to boundary air riding over the turbulent air represented by the snow-packed in. The snow on top of the bumper is caressing the pore converging diverging duct formed by the snow packed into the bed/bumper and body shape, filling the low velocity/turbulent zone on its surface making the transition to vertical smother.
there is a light breeze coming from the left at almost a right angle to the road(slightly a head wind ). the tufts on the top hainging over the duck bill as Aerohead calls it look like fish hooks insted if yarn.
Air makes a 270? 180 to go forward and 90 to go strait down the tailgate center, and progressing to outward but still down AND ATTACHED toward the corners of the bumper. 
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1st gen cummins 91.5 dodge d250 ,HX35W/12/6 QSV
ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 31.32mpg 100mi 3.193 USG 5/2/20
Former
'83 GMC S-15 Jimmy 2door 2wd O/D auto 3.73R&P
'79 Chevy K20 4X4 350ci 400hp msd custom th400 /np205. 7.5-new 14mpg modded befor modding was a thing
87' Hyundai Excel
83 ranger w/87 2.9 L FI2wd auto 18mpg on the floor
04 Mitsubishi Gallant 2.4L auto 26mpg
06 Subaru Forrester XT(WRX PACKAGE) MT AWD Turbocharged 18 plying dirty best of 26mpg@70mph
95Chevy Blazer 4x4 auto 14-18mpg
04 Chevy Blazer 4x4 auto 16-22mpg
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