They tend to fall into three main categories:
1. Those who have walked down to the gates, seen the closed signs and are about to walk back up again.
2. Those who loiter, hopeful that as you unlock and enter the gates they might enter also.
3. Those who are about to climb over the gates for an illicit free visit (or those who have just done so).
The walkers next to the gates today were particularly funny, as they fell into the “just about to climb over” category.
The amusement factor came from the chap who was in the process of lifting his dog up over the gate. Upon noticing our arrival behind them, the subsequent turning of that movement into a nonchalant, "I-wasn’t-really-in-the-process-of-lifting-this-dog-over-your-gate, this-is just-the-time-of-day-I-do-a-bit-of-dog-lifting, wheeeeee-he-likes-it!" gesture is a joy to behold.