Quick fix to prevent parapalegics driving with no legs.

code/modules/vehicles/ridden.dm

@@ -60,6 +60,11 @@
 	if(key_type && !is_key(inserted_key))
 		to_chat(user, "<span class='warning'>[src] has no key inserted!</span>")
 		return FALSE
+	if(canmove && (user.get_num_arms() < arms_required))
+		to_chat(user, "<span class='warning'>You don't have enough legs to operate the pedals!</span>")
+		canmove = FALSE
+		addtimer(VARSET_CALLBACK(src, canmove, TRUE), 20)
+		return FALSE
 	var/datum/component/riding/R = GetComponent(/datum/component/riding)
 	R.handle_ride(user, direction)
 	return ..()