[ Mantis seems to shrink into herself a little, not wanting to be the one to upset him but also not wanting to lie, and she tries quickly to reassure him. ]

You tried to shoot her! You did! [ She means that in the most assuring of ways, but fails to include the context as to why that's supposed to be a good thing. ] But we were too late, Thanos already had the reality stone and he used it to turn your weapon into bubbles, and Drax and I into- pieces. We could not stop him, but the Earth people were going to help us!

[ She really isn't trying to drop more bombs into his lap, is it working?! ]