Strange ! This is shocking !

[Grumpy old man]

last week the 50' cheap harbor freight air hose I drag around the garage separated mid line internally resulting in low pressure so in the thrash it went . I replaced it with a brand new Goodyear rubber hose without another thought Until I hooked it up to my 80 gal Black max compressor to blow some dust off the truck and ZAP ! I got shocked ! . I also have a Ingersol rand 60 gallon compressor I switched the air hose over to it with the same results Zap ! as soon as I touched the truck ZAP ! Both compressors are in great shape no funky wiring issues ,both sit on a anti vibration runner 1/2" thick rubber pad on the floor . Two totally independent compressors same result ? Well after checking everything again , No issues found . I shut everything down and drained the tanks , some moisture but not anything crazy . There is no battery in the truck so rule that out as a source . Well , it turns out the new hose I had sat in the sun in the driveway to help relive the coil in the hose was hot and with the moisture in the hose on a cool garage floor picked up enough static to send it through the hose to me when I became the ground . Craziest thing I've ever seen . I've checked everything again and no more ZAP!