Cambridge University students cast aside their gowns at the end of exam season and sailed the Cam — onboard cardboard boats.
The entertaining annual event was part of the alcohol-fuelled end-of-year celebration known as Suicide Sunday, and saw teams build boat using only cardboard, PVA glue and gaffa tape, and then race them from Jesus Green to Magdalene Bridge.
Hundreds of spectators, including passing families and tourists, lined the banks of the river to watch as competitors took to the water and hoped to stay afloat.
The preparations began early on Sunday morning on Jesus Green, in the centre of the historic university city.
Students of everything from engineering and maths to literature and history turned their brains to something more simple - making things out of cardboard.
Thirty teams of Cambridge University students took to the river in cardboard boxes as part of a booze-fuelled celebration of the end of term.
Some of the flimsy crafts fell apart around their captains — but others made it to the end of the half-mile course with the help of paddles and ping pong bats.
The vessels were cobbled together using cardboard boxes, glue and gaffer tape for Suicide Sunday, a rowdy celebration of the end of exams.
Oh no! Three students realised they had lost the race in the most awkward — and coldest — way possible, tipping into a busy section of the River Cam in the city centre.
Students multi-tasked by sipping on cans of Fosters lager as they tried desperately to stay afloat.
A group of students try in vain to right their capsized craft — as their competitors sail by effortlessly in bright green fluffy wigs.
These students clutched their drinks between their teeth as they used improvised paddles made out of tennis rackets to compete in the race.
The sturdier boats included multiple layers of tape over stronger cardboard tubes — but other contestants were forced to bail out straight away from their soggy models.
Some of the racers wore pirate hats as they crammed into their boxes, while others had a more leisurely time on rafts made from cardboard tubes.
In lieu of official paddles, some of the students appeared to have swiped dinner trays from their colleges.
Some of the competitors were more organised and laid their hands on real oars — while one shrewdly put diving flippers onto his arms.