While doing a finish line jump this weekend, my son got his bike pretty vertical and once he got back on the gas for the landing the bike started to spit/sputter and had no power. I was near the area and he pulled off until it started sounding normal again - bike ran fine after. After the race another rider said this happens when DFI/EFI bikes get too vertical...has anyone else experienced this? I figured I'd start here and search for more info after work. Thx!