Best running venue ever

Why do geese honk when they are flying? Geese honk from behind to encourage those up front to keep up their speed.

Speedygeese results today:
Stromlo Forest Park 8k
1 Jennifer Bright W35 36:46 70.4%
5 Mick Charlton M60 43:55 64.9
13 Nadine Morrison W40 38:46 69.0
15 Christopher Lang M60 43:47 65.3
26 Ruth Baussmann W60 47:27 69.8
32 Andrew Matthews M50 36:43 71.3
42 Geoff Moore M60 35:05 82.1
47 Roger Pilkington M50 38:56 67.7
66 Rae Palmer W60 48:25 71.6
81 Caroline Campbell W65 52:07 73.7
89 finishers

Stromlo Forest Park 4k
31 Jill Pearson W50 22:32 66.4%
47 Tony Booth M70 24:09 66.3
47 finishers

A beautiful day and a fantastic venue. Best running venue ever.

Formal logic

Note that this implies you should NOT honk solely because I stopped for a pedestrian and you're behind me.