He stumbled as if he had been hit. However, he stumbled on a continent uncharted by Europeans which he thought was India. He accidentally stumbled upon the Americas, but believed he had reached the East Indies. However, while there, he stumbled on the rubble and fell. This one, I just stumbled upon and I really liked the content. Hank had stumbled upon his son abusing Seeley and drove him out of the house. When the rioters forced the officers back, Blakelock stumbled and fell. There was an earthen floor and holes one stumbled into at every turn. And with this I had stumbled into a wasps' nest! Many stumbled into the open and were quickly killed. It was within this context that Gulab stumbled upon Luttrell and gave him sanctuary. It was here that Falconer stumbled across "Frogger". In his first sketch as Matt Foley, he stumbled and broke a coffee table. He made them so nervous that, one by one, they all stumbled. Eventually, he stumbled onto a French outpost.