Another Custom Traceroute

hping2 -t 5 --traceroute -p 113 -S mx.chi.foocorp.com
[ results augmented again ]
5->TTL 0 during transit from 64.159.2.97  (ae0-54.mp2.SanJose1.Level3.net)
6->TTL 0 during transit from 64.159.1.34  (so-3-0-0.mp2.Chicago1.Level3.net)
7->TTL 0 during transit from 200.247.10.170  (pos9-0.core1.Chicago1.level3.net)
8->TTL 0 during transit from 200.244.8.42  (gige6-0.ipcolo1.Chicago1.Level3.net)
9->TTL 0 during transit from 166.90.73.205  (ge1-0.br1.ord.foocorp.net)
10->TTL 0 during transit from 200.247.228.247  (f0-0.b1.chi.foocorp.com)
11->Nothing
12->46 bytes from 216.163.143.2: flags=RA seq=0 ttl=48 id=53414 rtt=75.0 ms

Response from Hop 12?  That is fw.chi!  Other hosts on the subnet also answer 113 from hop 12.