Hill climbs. It'll hurt like hell the entire time. But even if you fall it's relatively safe on the steepest climbs where you probably won't exceed 15 mph.
Time trials may be second but will still involve a risk of crashing if the goal is to clock in a competitive time. There are lots of crashing among the pros in time trials, include practice rides to scout the TT segment. But it's usually a sliding sideways type crash, losing traction on curves. Not quite as bad as a bunch sprint crash with bikes and bodies spattered everywhere.