Sparkles/Twinkle-Fists
One of two things were likely going to be the outcome of their little experiment. Combining his power with hers up in the sky was either going to create some sort of light show akin to fireworks, which would be really spectacular to see. Or, they'd blowup the town. It was a risk, but they were both a bit drunk (Carol more than a bit) and Risk Management kind of went by the wayside at that point, especially when Thor had been feeling restless and reckless lately anyway.
It was indeed too bad that Carol wouldn't remember it. Thor would. He might recommend they try it again sometime, see if that couldn't create some sort of pattern in the sky or something other than the erratic beams of light and lightning going every which way.
If nothing else, she looked happy, and he was entertained at least for now by it. "Yes, again," he agreed. Once more, he channeled his energy and sent bolts of lightning up into the sky.