Why is Senna in tier 4?

Struggling with that one...
Think the user might be[NSFW]CowboysFromHell (and thats stretching it a bit)[/NSFW]
Cant think of a driver though

A fan of Trains who is recently seen in a film with Aliens.... ish
If i've got trulli, liuzzi, ricciardo or d'ambrosio i'm gonna cry.

Finally for tonight.
My driver famously beat Glock and Räikkönen having seen a Brazilian stranded just a few laps earlier.
