I had a player using spider climb in a small cave system, however the room flooded (quickly, with a high water pressure). Would he be able to hold on since he's using spider climb?
Alternatively, I thought of the same situation: while a person is normally scaling (climbing) a cliff wall, and water rushes down, should he just get a climb DC increase? (by how much?) or would he use a different skill, (I'd used a str check when the person is using a rope, and water rushes down.)
If the climb example would involve a DC increase, would that mean the spider climbing char does not need to roll:
furthermore, it need not make Climb checks to traverse a vertical or horizontal surface
Would indicate that the climb would not need to roll, except I saw this question "Alternative uses of Spider Climb" Which seemed to indicate that part is just a badly worded version of:
A creature with a climb speed has a +8 racial bonus on all Climb checks. The creature must make a Climb check to climb any wall or slope with a DC higher than 0, but it always can choose to take 10, even if rushed or threatened while climbing. If a creature with a climb speed chooses an accelerated climb (see above), it moves at double its climb speed (or at its land speed, whichever is slower) and makes a single Climb check at a -5 penalty. Such a creature retains its Dexterity bonus to Armor Class (if any) while climbing, and opponents get no special bonus to their attacks against it. It cannot, however, use the run action while climbing.
Thus the spider climb spell was a simplified version of having a climb speed (so you could climb any walls without caring about your climb score (otherwise you'd need points in climb, as you could just take 10 + 8 racial bonus))
Note: While I am looking for RAW, I don't expect this case to be covered. Thus house-rules, or RAI "fixups" are fine too.