Trigger Threading

I'm wondering if triggers are potentially executed in parallel (as opposed to in series) - other than during waits, of course. Obviously this would be a source (and explanation) of rarely occurring bugs in seemingly flawless code.

They occur in series. Parallel threads of JASS never occur.

main rule of JASS "Single thread at single time"

wait broke thread and after given time returns to it, mass waits will cause HURGE lag.

Its slower (I'm pretty sure) but it lets you do some nice things.