Here's a video that will make you wince - a group of mountain bikers in Spain who were attacked by a swarm of bees.
Just looking at the footage is painful, and we reckon the fact that two of the riders dumped their bikes altogether shows how intense it was.
The incident happened in March during the Tropical Bike Motril competition in Spain.
José Miguel Rodríguez, the vice-presidente of the organising group, was stung 80 times and had to be treated at a hospital in Granada, as did four other competitors.
"I've never suffered so much," he said.
"When I got home my wife was frightened. I had to take anti-histamine medicine."
He added: "I feel really bad at night."
At 37 seconds into the video, you can see a beekeeper on the right-hand side of the screen.
Bees can feel vulnerable when their hives are disturbed, making them more likely to attack as a means of defence, while some species in Spain and elsewhere can be attracted by human sweat.
Born in Scotland, Simon moved to London aged seven and now lives in the Oxfordshire Cotswolds with his miniature schnauzer, Elodie. He fell in love with cycling one Saturday morning in 1994 while living in Italy when Milan-San Remo went past his front door. A daily cycle commuter in London back before riding to work started to boom, he's been news editor at road.cc since 2009. Handily for work, he speaks French and Italian. He doesn't get to ride his Colnago as often as he'd like, and freely admits he's much more adept at cooking than fettling with bikes.