2. To rise to one's feet; to stand up. 1896 in Westm. Gaz. 27 May 6/1 With all dignity‥Alexandra Feodorovna upstood from her throne. But this doesn't have the urgency, it's just plain stood up in a single word. More urgent is upsprang or upsprung from upspring. OED upspring v. 2. To rise, to ascend; to spring or leap upwards; to start to one ... More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.