Large transaction on sandbox

Whiling playing with the sandbox I noticed that when I submit a large transaction. i.e. a choice that creates 1,000,000 contracts. The sandbox works really hard but it seems never end. Is it there anyway to control or terminate this type of transaction?

The Sandbox has no mechanisms to terminate commands, either automatically or manually. DoS protection is an important topic for production Ledgers, but I can’t say if and when such features will make it into Sandbox.

It could be just a fat finger…