Plopped on Prior Maboriel's horse, heard lightning, crash. Not sure what it is, I thought it was slof's horses at first, but I tested that and no. Ideas? (Yes, I ran this through BOSS =3 )

Oblivion.esm
Oscuro's_Oblivion_Overhaul.esm
Better Cities Resources.esm
Progress.esm
TNR ALL RACES FINAL.esp
TNR - ShiveringIsles.esp
Unofficial Oblivion Patch.esp
UOP Vampire Aging & Face Fix.esp
Oblivion Citadel Door Fix.esp
DLCShiveringIsles.esp
Natural_Weather_by_Max_Tael.esp
Natural_Habitat_by_Max_Tael.esp
Natural_Water_by_Max_Tael.esp
ln.esp
Atmospheric Oblivion.esp
36Sermons-Miltiades.esp
AliveWaters.esp
AliveWaters - Koi Addon.esp
AliveWaters - Slaughterfish Addon.esp
Bedrollsanyone.esp
Immersive Combat Music.esp
Immersive Travelers.esp
EVE_StockEquipmentReplacer.esp
Slof's Horses Base.esp
Oscuro's_Oblivion_Overhaul.esp
OOO-Water_Weeds.esp
OOO-Map_Markers_Stock.esp
OOO-No_Guild_Ownership.esp
OOO-Armor_Perks_WearRate_Repair.esp
OOO-Combat_Skills_Perks_Marksmanship.esp
OOO-DaedraLord_Quests.esp
OOO-Dangerous_Traps.esp
OOO-Deadly_Combat.esp
OOO-Magic_Effects+Enchantments.esp
OOO-Magic_Effects+Spells.esp
OOO-Magic_Game_Settings.esp
OOO-Potions.esp
OOO-WaterFish.esp
EVE_StockEquipmentReplacer for OOO.esp
Heroes of Cyrodiil.esp
Heroes of Cyrodiil Part 2.esp
Heroes of Cyrodiil Part 3.esp
Heroes of Cyrodiil Part 4.esp
Heroes of Cyrodiil Part 5.esp
MountainShack.esp
Knights.esp
EVE_KnightsoftheNine.esp
RTT.esp
Natural_Vegetation_by_Max_Tael.esp
Harvest [Flora].esp
Harvest [Flora] - Shivering Isles.esp
Birthsigns Expanded.esp
ScriptIcon_Replacer.esp
SM Rest.esp
TFE.esp
SupremeMagicka.esp
SM_ShiveringIsles.esp
SM_OOO.esp
SM_EnchantStaff.esp
SM_Scrolls.esp
SM_SigilStone.esp
EnchantmentRestore.esp
EnchantmentRestore_Wells.esp
SM Combat Hide.esp
sycHearNoEvil.esp
sycSHOUT.esp
Enhanced Grabbing.esp
Denock Arrows.esp
Kayo.esp
ProgressGSD.esp
ProgressMBSP.esp
ProgressSBSP.esp
ProgressRBSP.esp
ProgressRacial.esp
ProgressArmorer.esp
ProgressMercantile.esp
OOO-Level_Stock.esp
immersive_caves_manual.esp
Dark Dungeons.esp
Dark Dungeons - SI.esp
Corean_hair_for_Original_race.esp
Willful Resistance.esp
EVE_KhajiitFix.esp
Better Cities - Full City Defences.esp
Better Cities SKINGRAD.esp
Better Cities BRAVIL.esp
Better Cities ANVIL.esp
Better Cities - Ruined Tail's Tale.esp
Better Cities CHORROL.esp
Better Cities CHEYDINHAL.esp
Better Cities LEYAWIIN.esp
Better Cities BRUMA.esp
Better Cities LEYAWIIN - No Flooding.esp
Better Cities IC Arboretum.esp
Better Cities IC Arcane University.esp
Better Cities IC Arena.esp
Better Cities IC Elven Gardens.esp
Better Cities IC Green Emperor Way.esp
Better Cities IC Market.esp
Better Cities IC Talos Plaza.esp
Better Cities IC Waterfront.esp
Disable Tutorial Text.esp
Life Detected - OMOD.esp
Real Lava 1.3.esp
VG0SmarterTimescale.esp
AleswellHomeQuest.esp
Enhanced Economy.esp
Enhanced Economy - House prices.esp
Better Cities - House price patch.esp
Gamblers_of_Cyrodiil.esp

*twitch* Oookay, now I'm just not certain what it's from. I tested it on a different horse, lightning crashed again but OB didn't. Screen blurred, I heard the lightning again as I dismounted. Now, yeah- just confused on where that came from.

RTT.esp

It's a bug with his horse summoning thing. As I recall looking at him while getting on the horse supposedly stops it from crashing.

=( That's not a fun solution.