Checking In At King Khalid International Airport

My wife's visa finally came through! In total it took a little over a month which is fast by local standards. As Eid was only a few days away we decided that I'd go back to Singapore and then we'd both fly back together.
My flight to Singapore via Bahrain was scheduled to depart a week before Ramadan ended so I’d been told that King Khalid International Airport would possibly be quieter than usual. Fat chance.
When I turned up I could only just get in through the front door of the airport because the queue for luggage screening (and then check-in) was backed up so far. A typical Saudi queue had formed.
Let me explain what a Saudi queue looks like. Take one exit / entrance. Place ten rugby scrums in a row in front of it. This is a Saudi queue. It’s a maul. The queue was about 15 people across for only 2 scanning machines. I had three hours till my flight left. There would not be time.
Fortunately I had been warned that the porters could help out in these situations. I turned down the first two guys but on the third request I relented and let him take my bags. I’d been told that the standard tip for these guys was 10 SAR (about US$2) so as he carried my bags away I checked my pockets. Damn. I had either 4 SAR or a 100 SAR note. This could be tricky. I figured I’d never see him again so I’d hand over the 4 SAR and scarper.
He took my bag to the very front of the maul, right past (and sometimes through) the other people jockeying for position. We walked straight through the bag scanning area and straight to the first and business class queue. I tried to quell my rising embarrassment and explained I was only travelling economy but he didn't care. As the person at the front of the queue was being processed he pushed their bags forward and put my suitcase on the conveyer. As I stood and watched him in open-mouthed awe my hand in my pocket dropped the 4 SAR and reached for the 100 SAR note. I had met the Jedi master of pushing in. He was as oblivious to my admiration as he was to all the other people shouting profanities at him.
As I was checked in I got chatting to a friendly South African chap behind me who was going to be on the same flight to Bahrain. He was actually travelling business class so he had a right to be there. When checking in was completed I shook my porter’s hand and slipped him the 100. He stole a glance at it and I could see the happy surprise on his face as he grabbed my hand again to shake it once more. I can’t express how glad I was that I didn’t try to stiff him with the measly 4 SAR. Ironically, the South African chap had been in the same situation as me but had nipped to the shop to split his 100 SAR bill for two 50s. His porter must have seen how much I gave mine because when the guy handed over the 50 to him (already a princely sum compared to the standard 10 SAR) his face fell and he put his hand out for more!
I think I spoiled the market.