We were rafting a 10km stretch of the Mae Tang River in Northern Thailand.

They told us at the briefing that the rapids were Grades III and IV, but that meant nothing to me at the time. To give it some context, though, a kid in half a barrel could traverse Grade I, while a very lucky maniac in a kayak might survive Grade VI. I got a better sense of what to expect when they said that the river fell sixty metres in a kilometre and a half, sometimes over a metre in one drop.

We were four to a raft – the others were strangers to me – with a professional skipper to shout out instructions, “paddle forwards,” “paddle backwards,” “get inside,” “over to the left,” “over to the right” and “jump,” when we snagged on rocks and had to bounce ourselves off.

It was as leisurely at first as a punt on the Cam as we drifted down a calm stretch of the river, and the sun was hot and the landscape was lovely with mountains and fig trees and thatched huts along the bank.

Then we entered the rapids and the skipper’s instructions became urgent, and we tumbled and twisted through rocks, over ledges, like a spider being washed down the plughole. I turned away from the guy next to me and when I turned back he was gone: he was over the side of the raft. The skipper grabbed his life jacket and held him fast, but his head bobbed repeatedly underwater and the raft ran right over him.

I had a sudden horror that I might be watching him drown. But when we were out of the rapids and we hauled him in with a bust lip and grazes, he was laughing like a kid who had come off his bike and wanted to pretend it did not hurt.

Then another fast stretch, crashing against rocks; spinning one way, then the other. “Jump! Jump!” Plunging forward. “Get inside!” Gripping the safety rope tight, paddle tucked against hip, foot locked under the tube inside the raft. The roar of the rapids overwhelming. Two inches of water in the raft. My trainers soaked. A cut on my knee. But I stayed in.

Spinning anti-clockwise. “Paddle forward! Paddle forward!” Slamming into another rock, peeling off, and over the edge, spinning in the other direction. Flashback to the time I lost control of a car and pirouetted across the road and bounced off the barrier. Still in, though.

Toppling over another drop backwards, just hanging on. Rocks palpable underneath as the raft scrapes over them. Then another drop, a bigger drop; the raft bending in the middle. And just as it seems that it will tip end over end and catapult us out, we are through.

And then we were floating peacefully again, past a group of elephants whose mahouts had led them down to the river to drink. Some looked up; most ignored us.

I relaxed then, elated that I had managed not to end up in the water; and the skipper capsized the raft.

© Richard Senior 2015