yes looking at it afterwards I see such thigs too. but mostly uploaded as its kind of a fun stat, against LOKI too! But much can go wrong with this kind of rush, its very fragile. Guess it takes alot of micro, but the build is easy to do and autoqueue dwarves are not really difficult right?
A safer version would be the 4.20 rush with 2 barracks asap, and 3 oxcarts out, one on each resource. this can also be turned into a power ulf rush from the 2 barracks (2 barracks asap at 4.20 and non-stop ulfs from both is quite possible if you keep making dwarves. Then add their 9 sec train times and u got a hugh army very fast!!!).