You cannot prove some negatives absolutely. Lazy soft/weak atheists simply withhold belief without claiming proof. Hard atheists assert “no gods exist,” but burden stays on claimants since proving universal absence is often impossible—think Bertrand Russell’s teapot.
God, if you exist, hit me with a lightning bolt and cancer, right now.
An out of the blue response! Reminds me how I was struck by lightning once in Charlevoix, QC by the river. And how cancer runs in my family. If that prayer doesn't work for you, Christians do have the Lord's Prayer. Which reminds me of the song "Walk This Way." Anyway . . .