Re spider guard on the street
Two main problems that I see:
1) generally need sleeve control - hard to play this with no gi. Attacker may be wearing t shirt for eg. You can use wrist control but extending leg in his bicep/hip can break your own grip.
2) Exposure of groin to knees/stomps.
Pace KF, FD and others open guard with lots of kicking/offbalancing is best for street IMO. Personally Not too keen on subs from bottom - chance of being slammed/stacked. And as noted always better to play top game but - you may not have that choice............
'In the woods there is always a sound...In the city aways a reflection.'
'What about the desert?'
'You dont want to go into the desert'
- Spartan