Saw an accident this morning

btw, i now scream 'oi' at distracted crossing pedestrians. i do it so loud that i can feel my chest vibrating. most times it sounds like an angry pitbull bark, but it works just fine.

I always shout "heads" very loudly.

for me it's the only shout that seems to work as it gets people looking up and stopping as they feel that something might be endangering them. Oi could refer to anyone so can be easily ignored.