+No extra weight
+One less seat to buy so you save money
- cant show friends whats it like to go fast
+only put yourself in danger
- your own pit support ( flats ectra)
+You have someone to scare the hell out of
+give rides to friends while practicing ( and scare the hell out of em)
+built in pit support
+someone to prove you did something cool
-witness if you screw up
-really sucks to hurt or maybe kill a friend.
I have seen a grown man throw up from fear, and a woman swear she would never get in another race car after hardly going fast.