THE devastated mother of an 18-year-old who was killed in a horrific collision on Easter Sunday has told how she will "never be the same" after the tragedy. Jason Monks died when the scrambler motorbike he was driving collided with a car on Citywest Avenue in west Dublin at around 8pm. The young father-of-one, who was from Jobstown, has been remembered as a "gentle giant" and "kind-hearted" person by heartbroken mourners. Taking to social media, Jason's grieving mum Donna said her heart is "shattered into a million bits". And, addressing a fundraiser that has been set up to "give Jason the send off that he deserves", she thanked all those that have donated. She said: "I would like to start by saying thank you to each and everyone for all the support you have shown us the last couple days. "Jason was loved and will always be by all the people that had the pleasure of knowing him even though we have only know him a short 18 yrs they have been the absolute best. "I for one will never be the same. I have lost my big beautiful baby. "Let's all give him the send off fit for a king. I LOVE YOU MY GENTLE GIANT." Jason's partner Shannon shared a photograph of him holding their baby daughter and wrote: “Wish this was all a bad dream.” Shannon’s grandfather Mark told how Jason was a person "who would do anything to help anyone who needed it". He added: "A lovely young man with the biggest heart, and a smile and laugh that would cheer you up in the worst of days." A friend said: "Absolutely lovely Kid. Always the first to give anyone a hand". Another pal, who opened the GoFundMe page for Jason's funeral, told how he was "always there to lend a hand" and asked others to do the same for him and his family following the tragedy. She said: "Please donate to help us give Jason the send off he deserves. WITNESS APPEAL "Everyone knows how Jason would have helped anyone he was the most kind-hearted, loving person. Always fixing everything for everyone alway there to lend a hand. So please do the same for him". The campaign has so far raised €910 out of its €2,000 goal. A post-mortem is due to take place and Garda Forensic Collision Investigators have conducted a technical examination of the crash scene. Anyone who may have witnessed the crash has been asked to come forward. A garda spokesperson said: "Gardai are appealing for witnesses to this incident to come forward. "Any road users who may have camera footage (including dash-cam) and were travelling in the area between 7.45pm and 8.15pm are asked to make this footage available to investigating Gardaí. "Anyone with any information is asked to contact Tallaght Garda Station on (01) 6666000, the Garda Confidential Line on 1800 666 111, or any Garda Station."