looked into this a little, and it seems that there have been other funnier bank runs, most notably the Toyokawa Shinkin Bank incident

On the morning of December 8, 1973, three female high school students talked about their jobs after graduating, in a car on the Iida Line, Japanese National Railways. Two of them (B, C) mocked A, who worked at Toyokawa Shinkin bank, remarking “that is dangerous". This remark was not a statement about the financial security of Toyokawa Shinkin bank, but rather that an armed robbery might target the bank.[1] This was intended as a joke but A took it seriously. That night, A asked a relative of hers, D, "Is Shinkin Bank dangerous?" D assumed that she referred to Toyokawa Shinkin Bank, and asked another relative, E, who lived near by the main branch of Toyokawa Shinkin Bank "Is Toyokawa Shinkin Bank dangerous?"[1]

On December 9, E spoke to F who was the owner of a beauty salon, whether "Toyokawa Shinkin Bank might be in danger (of bankruptcy?)"[1]

On December 10, a cleaning service shop owner H, and his wife I, who happened to be present there heard the rumor when F talked about it to relative G.[2]

On December 11, the rumor was a topic of conversation among housewives in Kozakai.[3] The rumor had taken on an assertive form such as, "Toyokawa Shinkin is in danger" at that moment.[3]

On December 13, J who had borrowed the telephone in H's shop, ordered the person at the end of the line to withdraw 1.2 million yen from Toyokawa Shinkin Bank.[4] J had not heard the rumor, and just requested the withdrawal in order to make payment. However, I who overheard the ordered withdrawal assumed that Toyokawa Shinkin Bank really was going into bankruptcy.[4] She also withdrew 1.8 million yen. H and I then spread the rumor. Amateur radio operator K also spread it widely.[4] Following this, 59 depositors came into Toyokawa Shinkin Bank and withdrew 50 million yen in total.[4]

honorable mention to the Washington Mutual bank run of 2008, thanks to their CEO's memorable 2003 quote "We hope to do to this industry what Wal-Mart did to theirs, Starbucks did to theirs, Costco did to theirs and Lowe's, Home Depot did to their industry. And I think if we've done our job, five years from now you're not going to call us a bank."

Yeah okay that's much funnier